90 IROC Conv

Ok I'm sure that this is probably a really dumb question but I'm looking at doing a tranny swap on my 90 IROC convertible from an A4 to a T-5. I'm not gonna do a T-56 swap because of all the complications with the speedo and all that. What I was wondering is about the World Class Super Duty T-5 tranny that Jegs has but its listed under Ford Racing parts. I was just wondering if this would still bolt up to the bellhousing for a T-5 on an F-body?

Also I'm having a little bit of trouble trying to find specs on this tranny. Like the overall dimensions and such. Any info would help. Thanks.

Here's the URL for the listing of the T-5 on Jegs.com:

http://www.jegs.com/cgi-bin/ncommerc...48&prmenbr=361

Thanks guys for all your help.

Jim85IROC

A Ford T5 won't work with our cars. The tailshaft is completely different, and I believe the shifter location and input shaft are both different as well.

Spohn.net sells a T56 that bolts up to the T5 equipment and will work with your mechanical speedo. It even uses a T5 shifter. You could always do what I'm doing and do the T5 swap and plan on getting that new T56 down the road.

90 IROC Conv

I don't have a mechanical speedo, its electronic, I think the 87 was the first year for the Firebird and 89 or 90 was the first year for the Camaro to have the electric speedo. The T-56 puts out a much higher pulse rate than the T-5 and thats not good. A company makes a converter that changes the pulse for the speedo but it is not recommended cuz I heard that it has some problems with the ECM. And I would like to put a T-5 in my car to make it apeal like it came like that stock. Do you know where I can get some T-5's new or used. I've already checked out thirdgenresource.com, thats gonna be my first choice for getting a used one and parts, but if I can get a new one that would be great too.

Jim85IROC

whoops. I didn't notice that you had a 90. Well in either case, the aftermarket T56 will accept a T5 drive gear and VSS/speedo cable turnie thingie.

I *think* the ECM in the SD cars is also capable of being programmed to recognize up to a 4khz pulse (I think stock uses 2khz). Of course, that doesn't help the speedo know what's going on.

The cheapest place to get T5s is probably through the classifieds of boards like this or thirdgen.org. I've got a full T5 swap for sale, but the trans is a non world class. If you wanted you could always buy it and resell the trans, or use it until it breaks. Behind a 305 even a non world class will last quite a while.

Black6SpdTA

whats the diff between world class and non? isnt it just stronger synchros and other internal parts. so you could even find a non WC and rebuild it with the stronger parts. but no doubt youre best bet would be classifieds.

ZZ430RS

You can't make a non-WC into a WC is what I have been told, the biggest difference is the WC has stronger tapered roller bearings and the non-WC has straight bearings. I'm using a WC behind my ZZ430 clone and it's holding up fine so far.

IgorT.455/406

I broke 7 T5s in the last 3 years. Three were World Class. If you CAN drive, a T5 won't last long behind a 305. If your motor is putting out any kind of power, don't waste time or money on a T5. Go with a T56. I have yet to hurt my T56 in my '94, and my '88 is now sporting a th350 until I get the funds for a th700 with a nice converter.

rudy

Forte's has a couple of Tremec 5 speeds for under 2,000 dollars that will fit your car. Just looked at their web site. Wouldn't be a T5, but would be a rock solid 5 speed that should bolt in relatively easily.

irocz8957

yeahs those trannys wont work in the f-body's but there is places that sell similar one's that are made for our cars not sure where but i know they do sell them!

Jim85IROC

You broke 7, yet a buddy with a 425hp 383 never even had a gear grind on his T5. T5s can and DO last behind 305s. My GTA has 140k miles and the synchros are just starting to have enough wear to get a bit fussy. I sure don't baby the car and neither did the last owner.

The fact is, some people break every T5 they get near, and others don't ever break them. What's the difference? Not the transmissions.

rudy

www.fortesparts.com/tremec.html

90 IROC Conv

Thanks guys, especially you rudy, that fortes web site really helped... I'm probably gonna end up getting the 3550. Thanks a lot. I'll definitely be giving them a call pretty soon.

IgorT.455/406

True and not true. I don't drive like a bitch. I have seen guys run fast and shift like my mom, and brake nothing. I have seen guys run 14s, have some fun, and blow them up in both Mustangs and F-bodies. My T56 is holding up just fine and I abuse it a LOT. All I am saying, a stock T5 is not very strong. Mine never broke behind the 305 either, and I beat on it. But the 350 and some 6500 RPM shifts broke stuff. And I used the T5s for a while, but in the end its a waste of money. The Tremec or a good, used LT1 T56 is a better investment in the long run. Your friend will brake that T5 with his 383, you watch.

ET3Partridge

Year One has them in their catalog, I think that their catalog for the 3rd and 4th gen camaros are still free