![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 |
Questionable
Join Date: Mar 2005
Location: Atlanta
Posts: 13,376
|
What tranny do I have?
My speedometer doesn't work. I think it's the gear inside the tranny that's not working.
I took the cable off at the tranny, clamped a drill onto it and slowly spun it - the needle jumped, so ... I know the cable and gauge seem to be fine. I'm pretty sure the cable is long enough, it sticks out enough that it looks like the gear in the tranny should have enough to grab onto. I need to tell the guys at the parts store what tranny I've got (it's attached to an L6 250). Or does it even matter? Would the gear be the exact same for snchryonized and unsynchronized trannys? What size or model is my tranny?
__________________
If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM. |
![]() |
![]() |
![]() |
#2 |
Registered User
Join Date: Nov 2004
Location: New Lenox,IL
Posts: 306
|
![]()
__________________
1985 Chevrolet C-30 454 1-TON Dooley 1969 CHEVROLET CST-10 PICK-UP Good memories 1999 Chevrolet Z71 Ext. cab 5.7L Good Memories With a quart of oil, and a gallon of gas, she won't let no other car pass!!!. ![]() ![]() |
![]() |
![]() |
![]() |
#3 |
Registered User
Join Date: Jun 2000
Location: Bismarck, ND
Posts: 4,285
|
I'm having the same problem. There's a short pin between the transmission and the external speedo gear that tends to shear. I guess it's from sitting alot with crusty grease in the grears. Mine's sheared before and now it's broken again. The last time it happened I bought one from the Chevy dealer but I checked again and they didn't have one. Someone else suggested a transmission shop. I'm sure you could find one at a junkyard if you looked around enough.
__________________
Unrestored 68 C-10 CST. Original 327. 4-Speed CH465. 50k or so miles. TREASURER, Drum Brake Club. |
![]() |
![]() |
![]() |
#4 |
Questionable
Join Date: Mar 2005
Location: Atlanta
Posts: 13,376
|
Okay, I can't really easily take pics. When I bought a newly rebuilt and customized L6 250 for it today ($300! Score!) I was talking to the guy and he said I had the "larger saginaw synchronized trany" in it.
The only other info I could give is this: On the metal badge attached to it (near to where the speedo cable reaches the gear on the tranny) This number is punched into the badge: 3968010 Y There is a GM part number stamped into the tranny, but I can't tell for sure if it was correct - low light outside and lots of paint and gunk. It looked like: GM 3952648 Thanks for any info anyone can provide. Yanking out the old engine (wee, starting to yank it out) today was a blast! Glad my friend has a cherry picker. Need to go buy a stand so I can rebuild it. Scary enough, I noticed I had a leak somewhere around the tranny. Looks like oil...guessing this tranny doesn't use normal fluid.
__________________
If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM. |
![]() |
![]() |
![]() |
#5 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
|
We are asuming it is a 4 speed....
does it have a real low granny first gear? |
![]() |
![]() |
![]() |
#6 |
Senior Member
Join Date: Apr 2002
Location: Help! I'm in an office park with its own network of freeways!
Posts: 470
|
He has the three speed, not the four.
Gimme a minute & I'll look it up.
__________________
'67 C20--427 tall deck/SM420, 4.10 HO52 (Michigan has not been kind to the Old Man) '95 Caprice--355 LT1/T56/3.42 8.5" 10-bolt (daily driver, almost 300k on the chassis) '07 Outback--wife's car. 125k & counting. No head gasket or transmission issues yet. *fingers crossed* |
![]() |
![]() |
![]() |
#7 | ||||
Senior Member
Join Date: Apr 2002
Location: Help! I'm in an office park with its own network of freeways!
Posts: 470
|
Quote:
Quote:
Quote:
Quote:
![]() Hope this helps.
__________________
'67 C20--427 tall deck/SM420, 4.10 HO52 (Michigan has not been kind to the Old Man) '95 Caprice--355 LT1/T56/3.42 8.5" 10-bolt (daily driver, almost 300k on the chassis) '07 Outback--wife's car. 125k & counting. No head gasket or transmission issues yet. *fingers crossed* Last edited by CE20934; 03-13-2005 at 04:54 PM. Reason: had to clean up the QUOTE tags |
||||
![]() |
![]() |
![]() |
#8 | |
He's got mean nasty FANGS!
![]() Join Date: Dec 1999
Location: Rockwell, NC
Posts: 6,509
|
Quote:
Josh
__________________
2004 K2500 Burb 1999 C3500 1985 Cutlass Supreme 1969 C-10 1967 C-10 Panel josh@67-72chevytrucks.com |
|
![]() |
![]() |
![]() |
#9 |
Senior Member
Join Date: Apr 2002
Location: Help! I'm in an office park with its own network of freeways!
Posts: 470
|
Assuming this is the truck & the picture is current, he has a 3spd.
![]()
__________________
'67 C20--427 tall deck/SM420, 4.10 HO52 (Michigan has not been kind to the Old Man) '95 Caprice--355 LT1/T56/3.42 8.5" 10-bolt (daily driver, almost 300k on the chassis) '07 Outback--wife's car. 125k & counting. No head gasket or transmission issues yet. *fingers crossed* |
![]() |
![]() |
![]() |
#10 |
Questionable
Join Date: Mar 2005
Location: Atlanta
Posts: 13,376
|
Thanks, guys. I do have a 3spd on the column. It has a granny gear or "Metro Detroit traffic gear" (1st gear
![]() We ripped out the original engine to replace it with another rebuilt 250 L6 this weekend. The new engine is in, but not finished hooking up the 3or 4 wires and one vacuum hose yet ![]() There are six bolts to hold the bell housing to the block, two longer bolts and four shorter bolts. The bell housing was easy to remove, but I forget how many bolts held it in. There was a lot of grease inside it from the bearing and fork tossing grease all over. There was a piece of flashing that was held in by two bolts and the three bolts from the starter. At the back-center of the bell housing, there is a disk-shaped part of the tranny with four bolts. On the passenger side of the tranny there is something that looks like a sensor with a male spade-type of tab (looks almost like the temp sensor on my engine, the one on the head, manifold-side) - this transmission sensor is closest to one of the large rods/tubes that comes down from the column. I would swear this was some shift indicator or temp sensor, but that's not an option in my truck (this isn't the only thing I've found in my truck that isn't hooked up - there are several other things like power steering brackets, several vacuum hoses coming out of the cab, etc.) The sensor is not hooked up. The ratio gear that the speedometer hooks into is on the driver's side of the tranny. I don't have any other information, but if you can think to ask anything, I'll be happy to answer. Two people thus far have said it's a saginaw syncrho'd tranny - one here and the guy I bought my rebuilt engine from. I'm not sure what it is. Josh - I found the same code you did on Google. Don't know what to think of it though. My truck can definitly only shift into (3) gears. It looks like it's possible to setup a floor shifter for the tranny, but ... I dunno. I wish it was a four-on-the-floor ![]()
__________________
If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM. |
![]() |
![]() |
![]() |
#11 |
Resident Curmudgeon
![]() Join Date: Dec 1999
Location: NH
Posts: 6,664
|
Seven bolts on shift fork cover=saginaw. Does it look like this? If so, it's not the original tranny that would have been in a 68. It's the 69-up syncro'd sagniaw version.
__________________
Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter ![]() Maybe I need to sell some of this crap ![]() Yet another Bozo with a sawz-all |
![]() |
![]() |
![]() |
#12 |
Questionable
Join Date: Mar 2005
Location: Atlanta
Posts: 13,376
|
I think I took a picture of the bell housing.
WAIT! I have more information: The Haynes manual for my truck said my tranny would have a little clip on the back of the fork to release it, but it sure as hell didn't have it there. The fork looked really damned new. We have to complely remove the bell housing from the tranny to get the fork off the bearing so it could be replaced. I only bothered because the clutch was slightly worn, although all of the other parts were in good repair. If nothing else, I have a spare 10" clutch, its bearing and all of the other parts laying around ![]() I will try to take pictures tonight. I have some from the front when the engine was out, but ... As always, thanks for the tips.
__________________
If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM. |
![]() |
![]() |
![]() |
#13 |
Questionable
Join Date: Mar 2005
Location: Atlanta
Posts: 13,376
|
Oh - and when you say "shift fork", what do you mean? When I was talking about forks in my last post, I was talking about the clutch fork. Guess they're two diff't things?
__________________
If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM. |
![]() |
![]() |
![]() |
#14 | |
Resident Curmudgeon
![]() Join Date: Dec 1999
Location: NH
Posts: 6,664
|
Quote:
This has nothing to do with bell housing or clutch fork.
__________________
Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter ![]() Maybe I need to sell some of this crap ![]() Yet another Bozo with a sawz-all |
|
![]() |
![]() |
![]() |
#15 |
Questionable
Join Date: Mar 2005
Location: Atlanta
Posts: 13,376
|
Ok, will check it out. I'll just take pictures of the whole damned thing tonight, including the new engine and everything. It still has the original rusty ass manifold on it, but the "new" one had a crack in it, so I used the old one.
Will post pictures. Would be grateful to have your input once they're up. Ttt
__________________
If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM. |
![]() |
![]() |
![]() |
#16 | |
Senior Member
Join Date: Apr 2002
Location: Help! I'm in an office park with its own network of freeways!
Posts: 470
|
Quote:
__________________
'67 C20--427 tall deck/SM420, 4.10 HO52 (Michigan has not been kind to the Old Man) '95 Caprice--355 LT1/T56/3.42 8.5" 10-bolt (daily driver, almost 300k on the chassis) '07 Outback--wife's car. 125k & counting. No head gasket or transmission issues yet. *fingers crossed* |
|
![]() |
![]() |
![]() |
#17 | |
Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
|
Quote:
__________________
1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
|
![]() |
![]() |
![]() |
#18 |
Questionable
Join Date: Mar 2005
Location: Atlanta
Posts: 13,376
|
Okay, maybe this will settle my question. I'm really sorry for taking so long to post pics, guys. I will post the three best pictures and link some more up at the bottom. The pics might take a sec to load.
Bell housing, clutch fork, etc: ![]() Driver side rear-to-front shot of tranny: ![]() Passenger side rear-to-front shot of tranny: ![]() Side plate of tranny - this is where the number above is pulled from that Josh ID'd(note the metal badge, I posted number previously also, it ends in a "Y"): ![]() Here are a couple more pictures that turned out crappy, but you can make out 6 bolts...I think there's a 7th on the front, but I couldn't see it from the angle I was at ---- and the camera ran out of damned batteries before I could finish!!!!! http://www.shifty.org/pics/68chevy/e...swap%20021.jpg http://www.shifty.org/pics/68chevy/e...swap%20022.jpg
__________________
If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM. |
![]() |
![]() |
![]() |
#19 |
Questionable
Join Date: Mar 2005
Location: Atlanta
Posts: 13,376
|
Oh - and I dunno if you guys like looking at pictures a much, but here are some pics of before and after the swap - it's 80% done. Took about 10 hours of solid work to get this far. Ran into a lot of obstacles along the way wiht parts not fitting. The only thing that isn't good at this point is the harmonic balancer - The one on the new engine doesn't match up with the old engine or the alternator.
![]() Anyways.. http://shifty.org/pics/68chevy/eng_swap/ Ignore my friend John, he's the nut that's trying to hump the new motor ![]()
__________________
If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM. |
![]() |
![]() |
![]() |
#20 | |
Senior Member
Join Date: Apr 2002
Location: Help! I'm in an office park with its own network of freeways!
Posts: 470
|
Quote:
I know the automatics had it up in the column, but I'm not too sure the three-on-the-trees did.
__________________
'67 C20--427 tall deck/SM420, 4.10 HO52 (Michigan has not been kind to the Old Man) '95 Caprice--355 LT1/T56/3.42 8.5" 10-bolt (daily driver, almost 300k on the chassis) '07 Outback--wife's car. 125k & counting. No head gasket or transmission issues yet. *fingers crossed* |
|
![]() |
![]() |
![]() |
#21 |
Resident Curmudgeon
![]() Join Date: Dec 1999
Location: NH
Posts: 6,664
|
Thats the 69-up syncro'd saginaw and that switch is for the TCS emmissions found on 71-up as the backup switch for the 3 speed is on the column.
__________________
Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter ![]() Maybe I need to sell some of this crap ![]() Yet another Bozo with a sawz-all |
![]() |
![]() |
![]() |
#22 |
Questionable
Join Date: Mar 2005
Location: Atlanta
Posts: 13,376
|
Sweet! Any cool stuff you can tell me about this tranny? Like....
Does this tranny normally require a tall hump to fit? Is it possible to use a floor shifter with it? What should I search for in Google to learn more about this thing (e.g. is there a part number or casting number I should look for)? should I take it to a shop if I want to rebuild it, or is it something I can do safely with a guide?
__________________
If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM. |
![]() |
![]() |
![]() |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|