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#1 |
Registered User
Join Date: Jul 2000
Location: Chandler, Arizona, USA
Posts: 299
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From 3-speed to a Muncie 4 speed.
Wondering what is intailed in doing this...and if anyone here has done the swap and can maybe describe the steps they went through. My 3 speed is giving out in my 68 and I am tired of shifting on the column. I am looking to get a Muncie, probably an M20 and swap it into it. Any help would be appreciated..thanks again guys!!
Douglas |
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#2 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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Jefe, do you have the saginaw 3 spd (full syncro, with 7 bolt side cover) in the truck?
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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#3 |
Registered User
Join Date: Jul 2000
Location: Chandler, Arizona, USA
Posts: 299
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ttt
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#4 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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I need a little more info on which 3 spd trans that you have as far as slip yolk.....but here goes. The 68 up bell has a larger center hole than the car bell,& you have a couple choices there. you can either use a 67 or older truck bell to properly center the trans, or have a ring machined to press over the OD of the front bearing retainer os the m20 trans. otherwise, the trans bolts right in, but you will need to bolt & nut the bottom 2 ears ,as the truck bell doesnt have the bottom 2 holes tapped. the saginaw 3spd is the same lenght & spline as the M20, so it wont affect the shaft lenght. the old "2 pin" muncie 3 spd(non syncro first) has a different spline output shaft than the 4 spd muncie, & i cant say on the lenghts, I have seen 2 different lenghts on this trans over the years, & am not sure which one was in the 67-68 trucks. Other than that, you will need to cut a hole in the floor for the shifter. good luck
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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#5 |
Registered User
Join Date: Jul 2000
Location: Chandler, Arizona, USA
Posts: 299
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It has a 7 bolt side cover on the driver side.
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#6 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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No problem with the shaft or slip yolk then.....
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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#7 |
Senior Member
Join Date: Dec 1999
Location: Knightstown, in, usa
Posts: 2,525
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If you find a Muncie (car type) 4 speed, one problem you will encounter is: the Muncie speedo cable outlet is on the passenger side of the trans case, making your truck cable too short. The fix is to find a cable from about a 1975 Monte Carlo, as the length is good, and both cable ends are right.
Another problem can be what shifter to use, and my truck has a Hurst originally made for a 57 chevy car. It fits the bench seat truck perfectly. Good luck
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1970 long fleet, 355 4 speed, primer, walnut goodies Last edited by shadetree; 11-17-2002 at 03:45 AM. |
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#8 |
Account Suspended
Join Date: Jan 2000
Location: Woodstock, IL
Posts: 7,020
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I have a passenger car M20 in my 69, lot's of fun.
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#9 |
Registered User
Join Date: Feb 2002
Location: Seattle, WA USA 98168
Posts: 70
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going to a Muncie 4spd
Jefe: My 67 came with a 68 Muncie in it with a Hurst shifter with a reverse lockout shifter from the former owner! I have the bench seat and it is close enough that I would not want to have a middle seat passenger very often, besides the fact that I don't have a middle seat belt and they ticket for that up here in Seattle. At work, I drive a late model Dodge that has a middle seat cut out, maybe for an opional console. I often thought that would be a great replacement seat as it has built in head rests and the bench seat is very comfortable. Don't need to recline as my coworker often grabs a few very comfortable zzzzzzzz's on our way between projects. Also, my shifter is quite low such that I'm bent forward a bit to shift it. It is also a fore and aft shift with a T handle that you lift up for 1st and 2nd! And it is really fun to drive, especially with my built 350 and headers to straight 3' pipe to flowmasters dumping at the axle. Its been lowered with springs and blocks for a lower and leveled stance.........do it, its such a macho feeling going through the gears!!!!!!!!:p
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StepSideRideRequired |
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#10 |
Gasser
Join Date: May 2000
Location: Thomasville,NC USA
Posts: 456
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I used the M21 to do this swap way back when. 82 I think. I have rebuilt it a couple times since, but all is good. Here goes;
..Bolts right up... both trans have 1 1/8-10 input shafts... check your M20 ..Drive shaft bolts in... could be an inch shorter tho, tighter fit now(my truck is lowered) ..I found a driver's side speedo tail housing.. used stock cable ..The most important part: Found a shifter adapter as mentioned by shadetree. I used a Hurst Competition Plus shifter. Slightly modified a shifter handle. Fits bench seat as if it were factory. ..Used a Hurst super boot .. Hayes gold series clutch and pressure plate ![]() ![]()
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:thud 70 sstep tubbed, Muncie, double hump, snowflake, |
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#11 |
Registered User
Join Date: Jul 2000
Location: Chandler, Arizona, USA
Posts: 299
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Thank you Thank yoU!!!
I appreciate all the info guys!! Sounds like the best way to go as far as the shifter is concerned is get a Hurst that is made for a 57 chevy? Just order one brand new? Also bellhousing I might have a little prob there but other than that I am gonna start on it tonight!!! Thanks guys!! |
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#12 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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Good luck......I know you will have a smile on your face , when you are "rowin" that Muncie
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__________________
69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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#13 |
Registered User
Join Date: Jul 2000
Location: Chandler, Arizona, USA
Posts: 299
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anyone know the part number on the shifter or assembly? The Hurst part number? Thanks again!
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#14 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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Here is a link for the 55-57 shifter... http://store.summitracing.com/partde...57#largerimage
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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#15 |
Registered User
Join Date: Jul 2000
Location: Chandler, Arizona, USA
Posts: 299
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Thanks Again!! Looks really good!! All I have to do then is buy all the linkage seperately right? I can't wait!! I will post pics when I am done. THanks again!
Douglas |
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