ok i am going to install a T5 behind my small block (info in sig below) i dont know if it is a WC or no-WC, but i want the manual setup, so i figured i would start here. i know the non-WC is rated at 250 something ft/lb and the WC is rated at 300. what i want to know is there a company out there that makes stronger internals for the trans??(cause i have seen big HP stangs with t5 before) i would like to make it stronger over the winter(damn snow) and need something to do anyways. i plan on getting a real nice clutch and it will probably leave the line at 3K or so. is this going to be a one time use deal, or might i get some runs before it goes? also if i want to switch to a Muncie or T56 will those use the same bell housing?? any info is appreciated oh godds of the trans board

i believe the mustang one is much stronger for some reason or another

there are internal parts available that raise it to 500 or so, cant remember who makes them though

tremmec makes parts, g-force makes parts, one other but i cant remember since i have only seen its once... a guy localy "vernw" had his built by tremmec, for his 383. i dont know whether its capable of abuse or not, frankly i want t56, or something even better with 500 or 600ft-lbs handling capacity, i have been dreaming of a 454 stroked roller motor. as far as the stock t-5 goes, me and my friend jeff run them, i have a non-wc and he has a wc we are both running heads & cam 350's. all we did to the trans is clutch and shifter. it works fine,

I can vouch that my G Force tranny is still holding up fine behind the 400, but I haven't ran slicks yet...

now are you guys sending your trannies out or can you buy the parts you need and do it yourself??

the strongest trans internals in the world wont help the fact that the case is so weak that it'll flex under abuse with just a 300ftlb motor....

if you're going to use normal, non sticky street tires all the time and be nice, it might hold. might not.

if you're going to use any kind of traction (AKA you're actually going to USE the power you're making) , then it will eventually break.


the T56s case is much beefier, and thats why it takes insane power with new guts.... and reasonably high power with stock guts.

Yeah, the weak case thing.

I'm not going to argue about it, but before I had my G Force trans built, I specifically asked them about the weak case issue, and about overall statements like yours above. . They stated that the T-5 case is really no weaker than any other. But I never heard anyone mention anything about a 300 ftlb limitation on the casing either until now. They do this for a living, so I dunno.

They do have Stangs running respectable times with them for a few years on slicks, and they do rate them at 500 Ftlbs, 600 hp.

Also, the VP, Mike Long contacted me after I bought a quart of additive from them. He wanted to know how well the T-5 was holding up after I had it a year. That's rare...and he was genuinley interested.

......I bought a 9" rear from Moser-complete. Hav'nt heard a peep from them. And it cost more than the tranny did! lol

A T-56 swap is always a good option too - rated at 450 ftlbs, but weighs more and you need some parts.

Or a Tremec. Also plenty strong but needs an adapter.

I chose G Force and so far, so good. nuff said.

You could PM TKOPEFOMANCE on this forum he builds g-force trannys but needs a WC core . He may be able to get you the gear sets too if you can do this your self . Good guy very helpful.

thanks for the info all, and if anyone else has some let me know

BUT now i have a different problem, i got the T5 but the guy didnt have the hydraulics or the fork, does anyone know the part numbers for any of this or if they are still made(hence i work at Pep Boys and get a discount)

someone mentioned tremec makes aftermarket internals like g-force does. how do they compare along with price?

You will have to buy the whole hydraulic assembly together. NOONE lists just the darn hose. The GM part number is 12527718. I think it was $130 or so from GM parts direct. No idea on the fork though.

the fork i think i will get from jegs or something, but does that part include the master, slave and line?? cause that isnt bad for $130

The 12527718 assembly includes master, slave, hoses & reservoir. I have a new one sitting on my work bench now. The fork is pn 14075725 & lists for $67.98. GMPartsdirect is no doubt cheaper.

how much is the g force trans.

good question im really interest in it to and how much people actually put into the trans for the final PRODUCT. and how it's working out?

You can now purchase a GM spec TKO 500 or 600 through one of TTC's distributors. Prices vary from $1700 to $1950 from what I have seen. The TKOs are rated for 500 or 600 ftlbs torque. It is based on the now discontinued 3550 trans with beefed up internals. The distributor I am getting mine from puts the TKO 600 in 9 sec Mustangs with a case girdle & some shifter mods.

I'm new to the Chevrolet Boards, but thought I would give some of the readers a little insight to the G-Force T-5 Transmission. We are one of G-Force Racing Transmissions top 5 Dealers/Distributors. We have built and installed Hundreds of Gear Kits into T-5 "World Class" Gear Boxes for many Mustang Racers.

G-Force developed the Gear Kit as an answer of being able to put more Power/Torque through the T-5. Now, I won't say the G-Force Transmission will support the same numbers as a Tremec TKO-600, but I will say we can get as much Power/Torque as what a TKO-500 will. The benefit of the G-Force Gear Kit is the following:

1.) It is a Bolt in Replacement for any 1988-92 Chevrolet Camaro/Firebird T-5 "World Class".

2.) Even with the "Wider" Gears the Transmission still weighs 30 lbs. less than a Tremec TKO-500 or 600. Less Rotational Weight will get the Car to Move Quicker.

3.) The Synchronizer Rings used in the T-5, are the same from what was used in the Factory Gear Box. The Tremec 5 Speeds have "Brass" Rings, which most people say make for very "Notchy" Shifting.

4.) There are 3 different Gear Kit available from G-Force for the T-5. They offer a Helical Cut/Synchronized Gear Kit, Helical Cut/Dog-Ring, and a Straight Cut/Dog-Ring. The Helical Cut/Synchronized is by far the most popular Gear Kit used when doing the T-5 conversion. The Dog-Ring Gear Kits work better for those that use the Transmission mostly for Drag-Racing purposes. The Dog-Ring Gear Kits can be driven on the Street, but the Life Expectancy is far less than that of a Synchronized Gear Box.

5.) The G-Force Gear Kit allows the Customer to re-use the Factory Bellhousing, Clutch, Slip Yoke, and Cross-Member. It is a "Drop-In" Replacement.

With all of the above being said, I have taken a few shots/pictures of G-Force Components we have in our Show-Room for everyone to view.


Picture of Ford Mustang T-5 Casing with G-Force Straight Cut/Dog-Ring Gear Kit installed!

from past experieces, those trannys are good untill you start putting slicks on, then thats when they go. if your just gonna be running stock tires, you should be ok

What's the gear ratios and price on the synchro gear kit? I've just started rounding up parts for a T5 swap.

Unfortunately, I'm not an Authorized Advertiser on this Board so I can't publish prices. But, since G-Force has "Map" Pricing on all of their products it really doesn't change from what they sell product at. However, we give other incentives to try and help the customer out.

-Helical Cut/Synchronized Gear Kit $1,095.00
Includes Cluster, 26 Spline Input Shaft, and 1st-3rd M/S Gears.

Thanks,
Tony
tony@astroperformance.com
www.astroperformance.com

So you've owned a G Force trans and had problems with it when you used slicks? Is it weaker than other transmissions when using slicks? - Just curious.

I know that we push the idea of using an Upgraded 9310 Alloy Output Shaft when customer's are using "Slicks". I had one customer that actually had a Stock Mainshaft hold up for 2 Years with 24 Passes at the Drag-Strip. This customer had 600HP @ 600Ft. Lbs. of Torque. Unfortunately, the last "Slick" Pass at the Drag-Strip the customer "Twisted" the Splines. He called and we got him a 9310 Alloy Shaft and 58 Passes later he is still going!

Thanks,
Tony
tony@astroperformance.com
(866) 253-0019 Natl.

Any info on the gear spread? I've heard they are better than what's in a stock T5.

The Straight Cut/Dog-Ring Gear Kit has a tendency of having more Gear Spread than Helical Cut Gears. The Positive Side to the Straight Cut/Gear Kit is that the Gears "Accelerate" Quicker than Helical ones. The Helical Cut Gears "Gravitate" towards the Center of the Gear it "Mates" with. My opinion is that Helical Cut Gears are "Stronger.

Thanks,
Tony
tony@astroperformance.com
(866) 253-0019 Natl.