Transmission/forged internals questions

[Cobraman]

T45 will last. Swap with a 3650 later on. I have a 98 cobra with 22k miles and I'm pulling the t45 to put a built 3650 I have laying around. Way better tranny.

The shats are fine. Centris wont make the torque to break them.

What kind of $$ are we talking for forged internals?

[majorownage]

What kind of $$ are we talking for forged internals?

Start with 1000 for a set of rods and pistons/rings


Labour will be lots more

[Dan03mach]

For a Trans do a T56, keep your block and have it built with good internials. Get all the machine work done and build it your self. It isn't hard to do.

[Dan03mach]

Find a 03-04 cobra short block or find some good used cobra internals.

I personally like the 3650, they can be had cheaper then the t56. The input shaft on the 3650 is suppose to be the weak link. But I've seen one get beat on with 470rwhp and 600rwhp and it lasted fine.

That would be the easy route.

The 3650's are POS. I've shattered the Gears in my stock one N/A...

[majorownage]

Total build cost will be around 4k.

Line bore, overbore, decking
Crank balance, polish, new bearings
Valve job on the heads with new bronze guides
That was the total cost for me including labor was around 2.5k because I waited for deals

[thesource]

The T45 and TR3650 are really about the same in strength. Each have their pros and cons. Since you have a T45, I would either spend the money to build it or replace it with a T56. I recently did a T45 with billet shift keys, bronze fork pads, billet shift forks but stock internals for a boosted Cobra making around 500 at the wheels. The key to making it last is going with a soft hitting clutch instead of something that hammers the transmission.

[Cobraman]

The T45 and TR3650 are really about the same in strength. Each have their pros and cons. Since you have a T45, I would either spend the money to build it or replace it with a T56. I recently did a T45 with billet shift keys, bronze fork pads, billet shift forks but stock internals for a boosted Cobra making around 500 at the wheels. The key to making it last is going with a soft hitting clutch instead of something that hammers the transmission.

How much did you charge?

[majorownage]

The T45 and TR3650 are really about the same in strength. Each have their pros and cons. Since you have a T45, I would either spend the money to build it or replace it with a T56. I recently did a T45 with billet shift keys, bronze fork pads, billet shift forks but stock internals for a boosted Cobra making around 500 at the wheels. The key to making it last is going with a soft hitting clutch instead of something that hammers the transmission.

Like a dual mcleod clutch?

[KungFuHamster]

The key to making it last is going with a soft hitting clutch instead of something that hammers the transmission.

can you name one of these soft hitting clutches? i bet thats the ticket with these new MT-82 trannys too.

OP, go with what majorownage said....keep your stock aluminum block, buy all quality parts and take it to a reputable machine shop. dont forget to add in all the little things that you may not be thinking about because that shit will nickel and dime you to death (is now a good time to put fresh timing chains on? etc)

[majorownage]

can you name one of these soft hitting clutches? i bet thats the ticket with these new MT-82 trannys too.

OP, go with what majorownage said....keep your stock aluminum block, buy all quality parts and take it to a reputable machine shop. dont forget to add in all the little things that you may not be thinking about because that shit will nickel and dime you to death (is now a good time to put fresh timing chains on? etc)

I asked the tranny guy if a dual disc clutch would help.

That's what my plan is.

[jnobles06]

Total build cost will be around 4k.

Line bore, overbore, decking
Crank balance, polish, new bearings
Valve job on the heads with new bronze guides
That was the total cost for me including labor was around 2.5k because I waited for deals

this. plus all the little shit adds up. like new headbolts, gaskets, main studs and side bolts.

i'd look in to promotion t-45's. thats what i plan on running when my forged motor is done. to be honest i wanted to go auto but built 4r70w's are expensive!


brightmare.net ran a stock t-45 behind his 10 sec mustang on the show passtime. not sure how long it lasted though.

[Cobraman]

this. plus all the little @#!*% adds up. like new headbolts, gaskets, main studs and side bolts.

i'd look in to promotion t-45's. thats what i plan on running when my forged motor is done. to be honest i wanted to go auto but built 4r70w's are expensive!


brightmare.net ran a stock t-45 behind his 10 sec mustang on the show passtime. not sure how long it lasted though.

I'll probably just find an 03 cobra short block. $1500-2500 sounds much better than $4k, and I would need a $1k transmission to go with it. My goal is 550rw or so.

[thesource]

How much did you charge?

It was about $1400 for the whole thing. The forks themself were $350 of the price tag.




The billet shift keys were $160 of the price tag. Bronze fork pads were $50 of it and the rest was things like carbon fiber syncro rings and the labor.

As for the clutch, basically you want to stay away from a puck style setup that hits really hard. It will twist the input shaft in a high powered or heavy car. You can have a 26 spline shaft welded on to the stock input shaft which increases the strength but that runs about $400 to do.

Other things that will slightly help are having the internals cryo treated and polished but again, that adds to the price tag of the unit by about $350.

[91CoupeMike]

I'll probably just find an 03 cobra short block. $1500-2500 sounds much better than $4k, and I would need a $1k transmission to go with it. My goal is 550rw or so.

Those have low compression.

Find a mark 8 motor ~200 bucks. And throw 1000-1500 in internals in it.

[fastwhite99gt]

Stock crank, 5140 I beam rods, good 2618 pistons, head studs, have the heads cleaned up and a good valve job. Boost it till mid 600's and call it a day. The 3650 and t45's are both junk, I'd find a used t56 and swap it in. Having the crank turned-$100, rods-$250, pistons-$500, head studs-$250, boring-$250, plus whatever the heads take. Should be able to do it for around $2-2500 if you put it together yourself. A good used T56 should be around $12-1500 for the whole swap.