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Transmissions and Rear Ends Three on the tree or four in the floor? Shift it all here.

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  #1  
Old October 31st, 2016, 02:41 AM
wcstory wcstory is online now
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Default Looking for info on swapping from a SM420 to a T5

I picked up a 26 spline S10 WC T-5 off craigslist today.

A while ago I read a great thread on swapping a T-5 in place of a SM420 on a 305e. Now I cant find it. There is a good thread on T-5 on the 67-72 Chevy Trucks Forum in the 60-66 section.

Swapping manuals transmissions are a bit alien to me. All of my previous experience was auto trannys. I already had an original auto trans adapter for my 305e and was going to go to a 700r4 when I found the T-5. I'd rather keep the original look on a manual trans in my truck. With a OD I can keep my rear gearing and drive on the highway.

Winding out at 50 made for some long rides to work.

Last edited by wcstory; October 31st, 2016 at 03:02 AM. Reason: I suck at typing
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Old November 14th, 2016, 12:01 AM
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Default Re: Looking for info on swapping from a SM420 to a T5

Well I'm progressing on my pre-swap planning.

Emailed Modern Driveline and received a call back from Jeff. They have an adapter to fit my 1993 T5 to my SM420 housing. The T5 I have is from an S10, but has a Ford bolt pattern. Their adapter is $160

I'll need a Ford throw out bearing and have to shave the clutch fork to fit the throw out bearing. Along with getting a new bearing support.

My T5 also has a VSS speedometer hook up. I decided to use a shop in Washington that modifies VSS housings for cable drives. Their fee is $250 plus shipping.
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Old November 18th, 2016, 01:58 PM
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Default Re: Looking for info on swapping from a SM420 to a T5

Make sure you take a metal stamper and stamp out FORD TRANS on the trans and CUSTOM BELLHOUSING, then FORD T/O BEARING etc or 10 years from now you'll sell the truck to a junkyard because you can't remember what frankenstein parts you put in there.
Seen it happen so many times before. And if you don't your next owner will.
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Old November 22nd, 2016, 05:07 AM
AZKen AZKen is online now
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Default Re: Looking for info on swapping from a SM420 to a T5

Why couldn't he put the paperwork in an aluminum can and encase it in the cab like one of those time capsule things? No? Stupid? Never mind.... With a picture of Trump and a Samsung exploding phone and a 2016 coin and a Pepsi? OK Ok....are there any 2016 coins?

Last edited by AZKen; November 22nd, 2016 at 05:21 AM.
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Old November 22nd, 2016, 02:21 PM
wcstory wcstory is online now
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Default Re: Looking for info on swapping from a SM420 to a T5

I actually keep a log book of any changes made to the truck, non standard parts used, part numbers and sources
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Old November 23rd, 2016, 03:11 AM
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Default Re: Looking for info on swapping from a SM420 to a T5

To clarify my reply

Up till now the only changes to my GMC have been for drive-ability and safety.

I replaced the ultra heavy utility body with a Stepside bed, added power steering and replaced the standard heater with a 1963 recirculating heater to unclutter the engine bay.
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