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Old 10-31-2014, 10:55 AM   #51
Lugnutz65
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Re: T5 T-5 transmission to 235 inline or V8 with 10 spline the easy way

I hope my T5 section isn't confusing. LOL! If it is, then please send me a PM about it and I'll edit my T5 pages to help avoid further confusion.
When you go shopping for a T5, keep in mind that an S10 or S15 T5 from 1992 and earlier will be a non-world class with brass synchros. Only 1993 is both World class and Muncie case pattern. 1994 and up S10/S15 trucks will have a Ford pattern case.
Also remember 1988-1992 Camaro/Firebird T5s are WC. 1987 and earlier are NWC.
Try to find a T5 with a 5th gear that will be a good match for the rear diff gear and tire size. Otherwise the results may be disappointing.

1993 and up Camaro/Firebird T5s will have a Ford case pattern and probably not suit your needs.

Finally, contact me if you are having trouble finding what you need. I have successfully shipped all over the continental USA.
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Old 11-02-2014, 06:45 AM   #52
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Re: T5 T-5 transmission to 235 inline or V8 with 10 spline the easy way

Not really that confusing, and a very good write up. Just more info than I was looking for when I first read it.
I was talking to the guy who runs my local yard, and he can search either by application('93 S-10)or by tag number. Since I won't be able to check the gearing before he orders it, I was hoping either you or Fisher had a tag number of a NWC trans with the .72 overdrive. Figure that's probably the best way to get what I want the first time.
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Old 11-02-2014, 07:25 AM   #53
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Re: T5 T-5 transmission to 235 inline or V8 with 10 spline the easy way

This link has a pretty nice chart.
Borg Warner assigned a tag# for the first year the T5 was put into service, meaning that the chart might say 1990 but you might still find that same T5 and tag# in a 1991 or 1992 etc.
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Old 11-23-2014, 07:40 PM   #54
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Re: T5 T-5 transmission to 235 inline or V8 with 10 spline the easy way

Here's a link to my website page where I show a complete slide show of the Jeep shaft swap.

S10 T5 Transmission Jeep Shaft Swap - DIY and skip the adapter plate
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Old 12-07-2014, 12:08 AM   #55
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Re: T5 T-5 transmission to 235 inline or V8 with 10 spline the easy way

Quote:
Originally Posted by Lugnutz65 View Post
Here's a link to my website page where I show a complete slide show of the Jeep shaft swap.

S10 T5 Transmission Jeep Shaft Swap - DIY and skip the adapter plate
That's a link back to this tread
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Old 12-07-2014, 08:07 AM   #56
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Re: T5 T-5 transmission to 235 inline or V8 with 10 spline the easy way

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That's a link back to this tread
My bad. THIS is the correct link.
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Old 03-17-2015, 06:06 PM   #57
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Re: T5 T-5 transmission to 235 inline or V8 with 10 spline the easy way

Will the T 5 fit under a low hump cab? I'm thinking about swapping out my 3 speed in my 64.
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Old 03-17-2015, 07:33 PM   #58
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Re: T5 T-5 transmission to 235 inline or V8 with 10 spline the easy way

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Will the T 5 fit under a low hump cab? I'm thinking about swapping out my 3 speed in my 64.
Absolutely! Here's proof. My 1965 C10 has a low hump. My original bell housing is still mounted on the original crossmember too. No floor modifications are needed. Just cut the hole in the floor at the right place.
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Old 03-19-2015, 12:20 PM   #59
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Re: T5 T-5 transmission to 235 inline or V8 with 10 spline the easy way

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Originally Posted by Lugnutz65 View Post
Absolutely! Here's proof. My 1965 C10 has a low hump. My original bell housing is still mounted on the original crossmember too. No floor modifications are needed. Just cut the hole in the floor at the right place.
Thanks. I may be going with a '63 high hump or a '65 low hump depending on the cab I can get. My son hit a light pole with the '64. We had the frame and cab straightened but we are still having panel alignment problems.
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Old 11-17-2015, 02:37 PM   #60
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Re: T5 T-5 transmission to 235 inline or V8 with 10 spline the easy way

What ramifications are there going from a SM-420 to a T5? I would imagine drive shaft is the main issue?
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Old 11-17-2015, 02:44 PM   #61
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Re: T5 T-5 transmission to 235 inline or V8 with 10 spline the easy way

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What ramifications are there going from a SM-420 to a T5? I would imagine drive shaft is the main issue?
You'll need to shorten the drive shaft. Get a new yoke. If you have an ebrake cross member, then you might need to remove it and convert to a 1966 and up C10 version or just move the ebrake cross member to beneath the lower flange of the frame. Obviously you'll need to cut a hole in the floor for the shifter.
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Old 03-11-2017, 04:00 PM   #62
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Re: T5 T-5 transmission to 235 inline or V8 with 10 spline the easy way

I know this is an old thread but here goes. Got a T5 from S10 without current knowledge. Must be from 4cyl. First gear with the 4.11 rear won't get across an intersection. OD not much better than 4th. Want to have trans shop put V6 gearing in this trans and go to 3.73 ring and pinion. Engine is 235. Comments?
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Old 03-11-2017, 04:17 PM   #63
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Re: T5 T-5 transmission to 235 inline or V8 with 10 spline the easy way

What is the current tire size and rear ratio ?
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Old 03-11-2017, 08:20 PM   #64
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Re: T5 T-5 transmission to 235 inline or V8 with 10 spline the easy way

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Originally Posted by reichdav View Post
I know this is an old thread but here goes. Got a T5 from S10 without current knowledge. Must be from 4cyl. First gear with the 4.11 rear won't get across an intersection. OD not much better than 4th. Want to have trans shop put V6 gearing in this trans and go to 3.73 ring and pinion. Engine is 235. Comments?
If you have a non-world class S10 T5 tranny, you can look for a non-world class 5th gear set on eBay.

You have a choice. You can swap both the rear and the T5 gears . . . .
. . . . . . or you can just swap the rear.

For a 3.73 rear diff, you will want a 0.72 OD (5th gear set). Switching just the 5th gear set will require about 1.5 hours of work.

If your current T5 gear set (presumably from a 4cylinder S10) has a 4.03 first gear and a 0.86 5th gear, then a 3.08 rear will fix everything. To me, it makes perfect sense to just swap your rear to a 3.08 and be done with it. No need to change the T5 gearing if you swap to a 3.08 rear.

Here are the numbers for a T5 with your gearing matched with a 3.08 rear diff. For a daily driver, a nice performing drivetrain will have a final number between 9 and 12 for first gear and ideally between 2.6 and 2.8 for fifth gear.

Typical 4 cylinder S10 T5 gearing matched with a 3.08 rear diff.

First gear 4.03 X 3.08 = 12.41
Second gear 2.37 X 3.08 = 7.30
Third gear 1.49 X 3.08 = 4.59
Forth gear 1.00 X 3.08 = 3.08
Fifth gear 0.86 X 3.08 = 2.65


Typical 6 cylinder S10 T5 gearing matched with a 3.73 rear diff.

First gear 3.78 X 3.73 = 14.10
Second gear 2.18 X 3.73 = 8.13
Third gear 1.42 X 3.73 = 5.30
Forth gear 1.00 X 3.73 = 3.73
Fifth gear 0.72 X 3.73 = 2.68
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