tranny for 68 chevy pu - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ksuwildcats2004 · 03-22-2009, 06:12 PM

Hi all just joined today . my name is roger im 54 and live in ks.I have a 68 c10 chevy with the new process 435 tranny . It is stuck between 2nd and third gear and cant get it to free up. I can get the top cover lifted up about a inch or two but can not get it to come off. my understanding is it has to be shifted in the reverse position to come off. any advice on getting it unstuck so i can shift it .The syncros had been acting up for awhile before it got stuck so I dont think it is anything major that caused the hanging up .Also this tranny has the granny gear for first, is there another tranny that will bolt up and have a higher top end. Thanks in advance. Roger

earl87gta · 03-22-2009, 08:28 PM

I dont know much about the 435 but here is a link to newer 5 speed convertion you may want to look at.
http://67-72chevytrucks.com/vboard/s...d.php?t=212959

72blue · 03-22-2009, 11:57 PM

Quote:

Originally Posted by ksuwildcats2004

Hi all just joined today . my name is roger im 54 and live in ks.I have a 68 c10 chevy with the new process 435 tranny . It is stuck between 2nd and third gear and cant get it to free up. I can get the top cover lifted up about a inch or two but can not get it to come off. my understanding is it has to be shifted in the reverse position to come off. any advice on getting it unstuck so i can shift it .The syncros had been acting up for awhile before it got stuck so I dont think it is anything major that caused the hanging up .Also this tranny has the granny gear for first, is there another tranny that will bolt up and have a higher top end. Thanks in advance. Roger

rock the pickup back and forth with a strap or equivalent and see if that helps...

ksuwildcats2004 · 03-23-2009, 08:04 AM

Quote:

Originally Posted by 72blue

rock the pickup back and forth with a strap or equivalent and see if that helps...

72 blue could you explain some more on this Thanks Roger

**LockDoc** · 03-23-2009, 09:15 AM

Quote:

Originally Posted by ksuwildcats2004

72 blue could you explain some more on this Thanks Roger

Sometimes having someone rock the vehicle back and forth while you are pulling or pushing on the shifter will allow you to get it out of gear.

LockDoc

SacramentoJoe · 03-23-2009, 10:50 AM

Welcome to the Forum!

I have rocked the truck while smacking the levers with a mallot. Both levers got engaged so I had to figure out which one would disengage the easiest.

ksuwildcats2004 · 03-23-2009, 07:20 PM

thanks i will give it a try.

Wrenchbender Ret · 03-24-2009, 04:25 PM

Are you sure its a NP 435. The NP 435 has an aluminum cover and should come right off. Most of the 68 up Chevs. had the SM465. It has to be half way into reverse to remove or replace the cover. Remove the gearshift lever by putting a pair of pliers on the coller. Push down & turn it about an eight in. turn counterclockwise. The handle should come out. Then you might be able to go into the hole with a big screwdriver & move the rails to get them lined up.

Lugnut64052 · 03-24-2009, 06:39 PM

X2 Excellent advice.

It's called getting one cross-shifted, by the way.

And

to the board, from the Kansas City area.

ksuwildcats2004 · 03-25-2009, 06:17 AM

wrenchbender I think you may be correct. just looking at the cover gasket on the pics at novak conversions I believe the cover was not square (np 435) but had a angle on the left uppper side (sm465). I have off today and will check in a few hours and let you know for sure. Thanks Roger

ksuwildcats2004 · 03-26-2009, 09:26 AM

wrenchbender it is a sm465 tranny , thanks. now the question is should i get a used tranny or have this one rebuilt? Any one have a ball park price to have the tranny rebuilt? If i go with a used one it seems that there was a early version from 68-78, and a later version from 79-91. will either one work or do i need to stay with the earlier one? And lastly (for now) I cant get the cover to go back down to try the rocking trick. The rear of the cover seems ok but something up front is keeping the cover from going down. I have only lifted the cover up about a inch or two and never forced it very hard. Any thoughts on what could be holding the front of the cover up? Thanks again Roger.... edit:found this and it looks the 2wd tranny is the same from 68-91 other than some internal changes. http://www.novak-adapt.com/knowledge/sm465.htm am i reading that correct?

03-22-2009, 06:12 PM	#1
ksuwildcats2004 Registered User Join Date: Mar 2009 Location: manhattan ks Posts: 7	tranny for 68 chevy pu Hi all just joined today . my name is roger im 54 and live in ks.I have a 68 c10 chevy with the new process 435 tranny . It is stuck between 2nd and third gear and cant get it to free up. I can get the top cover lifted up about a inch or two but can not get it to come off. my understanding is it has to be shifted in the reverse position to come off. any advice on getting it unstuck so i can shift it .The syncros had been acting up for awhile before it got stuck so I dont think it is anything major that caused the hanging up .Also this tranny has the granny gear for first, is there another tranny that will bolt up and have a higher top end. Thanks in advance. Roger

03-22-2009, 08:28 PM	#2
earl87gta Senior Member Join Date: Dec 2003 Location: Kingsport TN Posts: 4,641	Re: tranny for 68 chevy pu I dont know much about the 435 but here is a link to newer 5 speed convertion you may want to look at. http://67-72chevytrucks.com/vboard/s...d.php?t=212959 __________________ Earl 68 2500 4x4 GMC Burb

03-23-2009, 10:50 AM	#6
SacramentoJoe Always Fixing Things Join Date: Mar 2007 Location: Roseville, CA Posts: 390	Re: tranny for 68 chevy pu Welcome to the Forum! I have rocked the truck while smacking the levers with a mallot. Both levers got engaged so I had to figure out which one would disengage the easiest. __________________ Just an Average Joe ‘68 GMC 307 3spd – My dad's original truck 310,000 miles

03-23-2009, 07:20 PM	#7
ksuwildcats2004 Registered User Join Date: Mar 2009 Location: manhattan ks Posts: 7	Re: tranny for 68 chevy pu thanks i will give it a try.

03-24-2009, 04:25 PM	#8
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,228	Re: tranny for 68 chevy pu Are you sure its a NP 435. The NP 435 has an aluminum cover and should come right off. Most of the 68 up Chevs. had the SM465. It has to be half way into reverse to remove or replace the cover. Remove the gearshift lever by putting a pair of pliers on the coller. Push down & turn it about an eight in. turn counterclockwise. The handle should come out. Then you might be able to go into the hole with a big screwdriver & move the rails to get them lined up.

03-24-2009, 06:39 PM	#9
Lugnut64052 Middle-aged Curmudgeon Join Date: Jun 2008 Location: Independence, MO Posts: 753	Re: tranny for 68 chevy pu X2 Excellent advice. It's called getting one cross-shifted, by the way. And to the board, from the Kansas City area. __________________ Bret Check out the site's Truck Tech FAQ. Be a site supporter. My more-or-less pathetic build thread. Board members I've met: ------------------------------ Longhorn Man Dieselwrencher jholley big mike71

03-25-2009, 06:17 AM	#10
ksuwildcats2004 Registered User Join Date: Mar 2009 Location: manhattan ks Posts: 7	Re: tranny for 68 chevy pu wrenchbender I think you may be correct. just looking at the cover gasket on the pics at novak conversions I believe the cover was not square (np 435) but had a angle on the left uppper side (sm465). I have off today and will check in a few hours and let you know for sure. Thanks Roger

03-26-2009, 09:26 AM	#11
ksuwildcats2004 Registered User Join Date: Mar 2009 Location: manhattan ks Posts: 7	Re: tranny for 68 chevy pu wrenchbender it is a sm465 tranny , thanks. now the question is should i get a used tranny or have this one rebuilt? Any one have a ball park price to have the tranny rebuilt? If i go with a used one it seems that there was a early version from 68-78, and a later version from 79-91. will either one work or do i need to stay with the earlier one? And lastly (for now) I cant get the cover to go back down to try the rocking trick. The rear of the cover seems ok but something up front is keeping the cover from going down. I have only lifted the cover up about a inch or two and never forced it very hard. Any thoughts on what could be holding the front of the cover up? Thanks again Roger.... edit:found this and it looks the 2wd tranny is the same from 68-91 other than some internal changes. http://www.novak-adapt.com/knowledge/sm465.htm am i reading that correct? Last edited by ksuwildcats2004; 03-26-2009 at 10:02 AM.



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