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Old 05-01-2007, 04:08 PM   #1
Imacarguytoo
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4 Speed Questions

I have a granny low 4-speed in my truck. Will the factory crossmember and everything for the clutch work with a truck 3 speed?

It gets stuck in 3rd gear when i come to a stop. Its kinda hard to get it in 3rd gear. And i cant downshift at all.
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Old 05-01-2007, 04:38 PM   #2
airdale94
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Re: 4 Speed Questions

If you have the heavy duty Muncie SM465 they have the 5 1/4" front bearing retainer, all the rest are 4 1/8" so you will need a different bell housing.

Here's a link I got for transmissions they sell rebuild kits with complete instructions. I got a SM465 I'm going to rebuild befor I put it in my 68 C20.

http://www.novak-adapt.com/knowledge...on_gateway.htm

Last edited by airdale94; 05-01-2007 at 05:23 PM.
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Old 05-01-2007, 05:13 PM   #3
Imacarguytoo
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Re: 4 Speed Questions

ok what about the clutch linkage...i think its called a Z-bar? And what about the driveshaft will it slide in to a truck 3-speed?
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Old 05-01-2007, 05:17 PM   #4
Blazer1970
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Re: 4 Speed Questions

Is your clutch releasing properly? What you describe does not really sound like a tranny issue.
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Old 05-01-2007, 05:33 PM   #5
Imacarguytoo
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Re: 4 Speed Questions

Quote:
Originally Posted by Blazer1970 View Post
Is your clutch releasing properly? What you describe does not really sound like a tranny issue.

Yes im sure its releasing properly. once i get it in gear it will go and not slip. It just seems that this tranny is not syncronized.
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'91 Gmc Suburban 3/4 2wd 454 Tbi
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Old 05-01-2007, 05:37 PM   #6
Imacarguytoo
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Re: 4 Speed Questions

Quote:
Originally Posted by airdale94 View Post
If you have the heavy duty Muncie SM465 they have the 5 1/4" front bearing retainer, all the rest are 4 1/8" so you will need a different bell housing.

Here's a link I got for transmissions they sell rebuild kits with complete instructions. I got a SM465 I'm going to rebuild befor I put it in my 68 C20.

http://www.novak-adapt.com/knowledge...on_gateway.htm

Thanks, but ive wanted to put a 3-speed in it. Or a car 4-speed. Im wanting to build another truck just like i had in high school.
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'67 C20 Lwb 350 4-Speed
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'91 Gmc Suburban 3/4 2wd 454 Tbi
'51 Jeep Cj3a "Willys" 350 V8
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Old 05-01-2007, 06:35 PM   #7
airdale94
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Re: 4 Speed Questions

Don't know for but I would think the Zbar and linkage would all be fine. Have no idea on the drive shaft.
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Old 05-01-2007, 06:47 PM   #8
larry may
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Re: 4 Speed Questions

I have a car 4 speed in one of my ole rides. Drive shaft is a one peice and worked out just fine. Fact is took out the old tranie installed the 4 speed . No issues of any sort. Wait I did run out of pepsi
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