Jeep T5 trans in the torquetube

Crazydaddyo - how do you like that Hurst shifter on the Jeep? I've got one NIB, but debating modifying a stock one...


Mac, the length of the case is from face-to-face is about 15-1/8"

 

Bill,
From front face to rear flange is 15". The S-10 4wd is @ 20".

 

Thanks guys!!!

 

I scavenged an aluminum case full sized 5 speed from a 90 chevy 1500 4X4 and would love to persue mounting it to my 40 rear axle if I knew the ratios. Should be plenty beefy enough for a good running flathead in a 34 coupe but I worry about the ratios being too truck-like.

 

I breifly looked at these trans, and found them too bulky and geared wrong for my application. The T-5 should be fine with the engine that you are building. Use the later Camaro gear sets as the first gear was much stronger.
Follow the link that Flathead Ernie has in his "quote" area of his posts. There is a lot of good info in there.

 

on the v8 tt shouldnt the same adapter work with an A cup?

 

It should work. Compairing my notes, they should work together.

 

Just a heads up - there's a HAMBer selling a Jeep T5 on THAT auction site, citing this thread in the advert, so the word is out, and a steady line of enquiries should follow.

Be warned - you've let the gennie out of the bottle

 

Well at least he didn't link this thread. I didn't plan on doing the jeep conversion any time soon. It is far more work to make the adapter for the Jeep trans. But if the demand is there, I will get it going.

A word to the wise, Don't run out and by the first Jeep trans that you find. Do a little reasurch about which trans to buy. There were different Jeep T-5's. There were also Jeep and Chevy 4x4 T-4's.
The T-4 was only a 4 speed and the tail shaft will not work on the T-5 main case. I have seen people selling T-4 transmisions on that auction site claiming that they were T-5s. Look for a bulge on the lower right side of the tailhousing that is just below the shifter flange. No bulge is T-4. The bulge is where the 5th gear runs in the T-5.

I hope everyone reads this thread carefully. Don't get carried away buying up every trans you can find without knowing what will work.

 

I have a T4 that has the bulge, but the numbers on the case aren't T5 and it only shifts into 4 gears (and reverse).

We have one of those Jeep 4x4 T5s, I was debating about posting it in the classified here, but of course if someone buys it I have to figure out how to ship it.. $#!@%....

 

This is what I'm talking about. Do the reaserch Know the numbers. Ask the questions. If you buy sight un seen and you didn't ask what numbers or if it was trully a 5 speed you have a good chance of getting junk.
Just like that person that is selling that trans on that auction site. They mention that there will be a conversion avalible. But they are mis leading potential bidders.
I hope that isn't your T-4 in T-5 case!!!!!

 

Shipping a T5 via UPS is typically between $70-100 anywhere in the US - they're under 70lbs. I like to put a rattle-can cap taped over the input shaft so it won't poke through any box I put it in - line it heavily with several layers of cardboard & tape over any openings to keep junk out.

I got a T4 shipped to me - got full refund, so kept it, but it's near useless...

 

No, the T4 is in the trunk of my '50 Chevy waiting for me to install it in the car. It was basically free, I pulled it out of the S10 it was in. The jeep trans came with some jeeps a friend got, and just happened to be laying loose.

 

Ernie,
What was the stock 1st - 5th gear ratios on the Jeep gear box?
Both of the conversions I've done were for the Model A engine and I used the 14 sline input shaft. What do you plan on using for the V-8 conversion?

 

Jeep T5 = 1st - 4.03 2nd - 2.37 3rd - 1.50 4th - 1.00 5th - 0.86

I'll be using an Astrovan gearset:

1st - 3.500 2nd - 2.14 3rd - 1.39 4th - 1.00 5th - 0.78

But I'll use the Jeep 5th gears & get the 5th ratio down to about 0.69 I think...

I'll have to double-check the input shaft on the Astrovan, but I think it's the same as the V6 Camaro & S10 input shaft...14-spline.

 

This is awesome - something I would have done instead of the open drive conversion - how cool to hook a banger to a T5 to a banjo and the only evidence is the tranny!

 

i must have missed it but how did ya hook the trans to the motor

 

Quote" i must have missed it but how did ya hook the trans to the motor"

Ah, there's the rub!

Depending on what engine you use, you will need some type of adapter- the one I will need (GM Quad4) costs around $450, but I'm hoping to find a cheaper way.

 

I believe the Jeep T5 uses a Ford pattern which presents its own challenges - I do not know if the input shaft length is the same as Ford.

My plan, since I'm tearing the T5 apart anyway, is to swap the guts into a Chevy pattern case & use the flat-plate adapter Dwight Bond sells.

If the Jeep is indeed Ford pattern and the input shaft length is the same, Mac's in New Zealand (I think) sells an adapter to put this tranny behind a flathead - I think Wilcap might as well, but not sure. There are other options too - check the T5 Tech

 

May be interested in the T4 as a spare.

 

I'm using a stock Model A bellhousing with an addapter plate I made.
Mac,
Your adapter is expensive because your adapting a front wheel drive engine to a different trans. You would have that cost regardless of which trans you used.
There are several options for adapting a T-5 to a banger or V-8

 

hey daddyo for refrence could we see pic of your trans adapter plate

 

Crazydaddyo,

Yeah, I know, but I was looking for an engine that captured the idea/look of a Fronty DOHC, and the Quad4 does a nice job...

Here's the Fronty

 

And the Quad4

 

Sorry, I don't have a picture of the plate by it's self. The plate is 1/2" thick and bolted to the stock "A" belhousing through the stock trans mounting holes with 1/2" flathead socket screws. I bored a hole to register off of the front bearing retainer. I cut the plate to the shape of the T-5 mounting flange In this case the Jeep T-5 (same as Ford T-5). Then transfered and taped the mounting holes for the T-5. The bearing retainer for the T-5 is bigger then the locating hole in the "A" bell housing so I had to indicate the hole in the addapter concentric to the hole in the bell housing. Once located, I doweled the adapter to the bell housing. Other wise it makes aligning the trans to the clutch almost imposible.
Here are some pictures of the assy. and a CAD layout of the plate.

 

You'll sell plenty of those things too...make 'em both Ford & GM pattern so you have one plate to cover both T5...

 

I'd back the multi bolt pattern adapter plate, but isn't there a difference in depth required between GM and Ford bellhousings?

 

cool thats much simpler then waht was rooling around in my head

 

I'm not quite sure what depth you are talking about. I have only done the trans swap on a Model A. Ernie should know more about the V-8 swap. If you are asking about the difference between the input shaft on the Ford or GM T-5 trans, as far as I know, the length is the same.
Ernie, do you know?