T350 to 700r4 column concern - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**N2TRUX** · 02-24-2005, 11:50 PM

I'm having a 700r4 put in my 77 in place of the T350. Has anyone ever modded the column to make it shift to all 4 forward gears? I know I can change the indicator with no trouble. What does it take to get the column to work correctly "besides" converting to a later column?

Jonboy · 02-25-2005, 12:01 AM

if you leave it as it is, the very worst is that you won't be able to pull the shifter down to first. I plugged the column out of the 82 Blazer I parted out right into my 77. I know that on some of the more popular floor shifters, there are companies that sell new detents for swapping to an overdrive trans, but not sure about a column.

What trans did your Blazer have? Can you borrow that column?

plumbcut · 02-25-2005, 12:42 AM

I have a 700r4 in my '77 and I get all gears.. its close, but it can be made to work... park is at the VERY top and 1st is at the VERY bottom of the range of movement..

pc

79BIG10 · 02-25-2005, 12:42 AM

Ken this should be easy. On the linkage rod (long rod) it has a adjustment on it. Just loosen the adjustment clamp to lengthen the rod's throw down. Have someone shift the column while you are tightening or loosening the rod's clamp. Once you have it set have the person go through all the gears. I've done this on a 83 Blazer and was easy.

**N2TRUX** · 02-25-2005, 01:23 AM

Quote:

Originally Posted by Jonboy

if you leave it as it is, the very worst is that you won't be able to pull the shifter down to first....What trans did your Blazer have? Can you borrow that column?

Yea but you know how anal I can be about these things. Even though I may never go through all the gears, I have to know that I can if I want to.
My Blazer had a 700r4 but the column needs rebuilt, and it has cruise on the stalk. I just put a rebuilt tilt colmumn in the 77 last year so I hate to change it again.

DOOBZ · 02-25-2005, 03:16 AM

N2TRUX I have done that swap a couple of times, your shifter will have plenty of swing for a 700R4 and you shouldnt have any probs with the adjusment. Also last time i did that swap GM still sold new shift indicators that you replace your PRND21 with PRND321 i bellieve. Good luck with the swap!

C-10volvo · 02-25-2005, 03:23 AM

on my 84 the numbers go P R N (OD) D 2 1

**N2TRUX** · 02-25-2005, 09:19 AM

Cool deal guys. Thanks for all the reply's. Keep them coming...

79Silv4x4 · 02-25-2005, 10:59 AM

Quote:

Originally Posted by N2TRUX

Cool deal guys. Thanks for all the reply's. Keep them coming...

Ask the guys at BowTieOverdrives. This may be what you need.

**Captkaos** · 02-25-2005, 12:22 PM

The column isn't tranny specific as far as I know, the linkage "should" work. They did on the ones I changed. The linkage might be different lengths though.

**N2TRUX** · 02-25-2005, 04:24 PM

Yeah we had planned to change the linkage to an aftermarket unit if we couldn't get it to adjust....

Jonboy · 02-25-2005, 05:08 PM

It may very well adjust. Honestly, the main reason I swapped the columns out is the one out of the 82 had tilt, my 77 didn't. I thought the shifter may be different, but wasn't sure. I just happened to solve 2 problems at once in my case.

plumbcut · 02-25-2005, 09:51 PM

I can tell you w/o hesitation that you do NOT want what 79silv4x4 linked-- I suckered and bought the same thing.. In all honesty its junk and wont work w/ our trucks...

pc

**N2TRUX** · 02-25-2005, 11:23 PM

Quote:

Originally Posted by plumbcut

I can tell you w/o hesitation that you do NOT want what 79silv4x4 linked-- I suckered and bought the same thing.. In all honesty its junk and wont work w/ our trucks...

pc

PC are you sure....

79Silv4x4 · 02-26-2005, 02:03 AM

Quote:

Originally Posted by plumbcut

I can tell you w/o hesitation that you do NOT want what 79silv4x4 linked-- I suckered and bought the same thing.. In all honesty its junk and wont work w/ our trucks...

pc

Simply for the record--I did not say that this WOULD work but APPEARED that it would.

Thanks for letting us know--my '79 has a 700R4 in it's future so I can rule this shifter out. . .

*1FaastC10* · 02-26-2005, 02:09 AM

no detents in the column whatsoever, so you shouldnt have any problems. just install an 82+ shift indicator on the cluster, and call it good.

bluex · 03-01-2005, 10:19 AM

Quote:

Originally Posted by plumbcut

I have a 700r4 in my '77 and I get all gears.. its close, but it can be made to work... park is at the VERY top and 1st is at the VERY bottom of the range of movement..

pc

I did this on mine and I had to slam the shifter at the top so it would fully engage into park. I have since adjusted it so it will not get 1st. I have an '86 tilt column I'm going to swap in hopefully that will take care of the problem. Right now I'm jsut trying to figure out how I can do away with the multifunction switch and change the cover on the top so its like the one in my '78 now.

boxrodz · 03-02-2005, 01:02 AM

You may find that once you properly adjust the linkage, you may not be able to manually shift it into 1st. I don't believe the column can be modified to correct this. Although it sounds as though some have been able to get it to work.

02-24-2005, 11:50 PM	#1
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,021	T350 to 700r4 column concern I'm having a 700r4 put in my 77 in place of the T350. Has anyone ever modded the column to make it shift to all 4 forward gears? I know I can change the indicator with no trouble. What does it take to get the column to work correctly "besides" converting to a later column? __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

02-25-2005, 12:01 AM	#2
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	if you leave it as it is, the very worst is that you won't be able to pull the shifter down to first. I plugged the column out of the 82 Blazer I parted out right into my 77. I know that on some of the more popular floor shifters, there are companies that sell new detents for swapping to an overdrive trans, but not sure about a column. What trans did your Blazer have? Can you borrow that column? __________________ 1974 Jimmy- 5.3/4L80e/NP241

02-25-2005, 12:42 AM	#4
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	Ken this should be easy. On the linkage rod (long rod) it has a adjustment on it. Just loosen the adjustment clamp to lengthen the rod's throw down. Have someone shift the column while you are tightening or loosening the rod's clamp. Once you have it set have the person go through all the gears. I've done this on a 83 Blazer and was easy. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

02-25-2005, 03:16 AM	#6
DOOBZ Registered User Join Date: Mar 2004 Location: RedWing Mn Posts: 24	N2TRUX I have done that swap a couple of times, your shifter will have plenty of swing for a 700R4 and you shouldnt have any probs with the adjusment. Also last time i did that swap GM still sold new shift indicators that you replace your PRND21 with PRND321 i bellieve. Good luck with the swap! __________________ 85 short, bags,4-link and sway bars

02-25-2005, 03:23 AM	#7
C-10volvo Registered User Join Date: May 2003 Location: Lake Oswego, Oregon Posts: 1,028	on my 84 the numbers go P R N (OD) D 2 1 __________________ Ken Morgan For fun: 1964 Volvo 122 For slow: 1984 Chevrolet C-10 For everything else: 1997 BMW M3

02-25-2005, 12:42 AM	#3
plumbcut california fill Join Date: Apr 2004 Location: Sunny So-Cal Posts: 694	I have a 700r4 in my '77 and I get all gears.. its close, but it can be made to work... park is at the VERY top and 1st is at the VERY bottom of the range of movement.. pc

02-25-2005, 09:19 AM	#8
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,021	Cool deal guys. Thanks for all the reply's. Keep them coming...

02-25-2005, 12:22 PM	#10
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	The column isn't tranny specific as far as I know, the linkage "should" work. They did on the ones I changed. The linkage might be different lengths though. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

02-25-2005, 04:24 PM	#11
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,021	Yeah we had planned to change the linkage to an aftermarket unit if we couldn't get it to adjust....

02-25-2005, 05:08 PM	#12
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	It may very well adjust. Honestly, the main reason I swapped the columns out is the one out of the 82 had tilt, my 77 didn't. I thought the shifter may be different, but wasn't sure. I just happened to solve 2 problems at once in my case. __________________ 1974 Jimmy- 5.3/4L80e/NP241

02-25-2005, 09:51 PM	#13
plumbcut california fill Join Date: Apr 2004 Location: Sunny So-Cal Posts: 694	I can tell you w/o hesitation that you do NOT want what 79silv4x4 linked-- I suckered and bought the same thing.. In all honesty its junk and wont work w/ our trucks... pc

02-26-2005, 02:09 AM	#16
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,399	no detents in the column whatsoever, so you shouldnt have any problems. just install an 82+ shift indicator on the cluster, and call it good.

03-02-2005, 01:02 AM	#18
boxrodz Until Seventy Times Seven Join Date: Feb 2005 Location: Rocky Mountain Front Range Posts: 1,301	You may find that once you properly adjust the linkage, you may not be able to manually shift it into 1st. I don't believe the column can be modified to correct this. Although it sounds as though some have been able to get it to work. __________________ boxRODz 1983 C10 SWB Fleetside When two halves is gone, there's nuthin left. Two nothings is nuthin. That's mathematics son. You can argue with me but you can't argue with figures. Two half nothings is a whole nuthin...



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