drbobvs

With a new T/C, and Amsoil synthetic tranny fluid I hope to be fine with my tranny @ 10psi. I know JDM is running a completely stock 5R55 in his Blue Saleen that just hit the 9's last month. No, it's not a DD, but it sees alot of track time without any issues yet. Jim Jr. is also running a 5R55 with the exception of only an aftermarket T/C. He's N/A with a built motor, and just hit 10's. No issues there either. Maybe place a call to Brenspeed to see what, if any, issues they've had with autos on their boosted cars. Weakest links in our tranny's is third gear, then the T/C. If I were you, I'd do what I'm doing. Change the T/C and fluid. We already have a pretty big tranny cooler on the car as it is. Wait until something breaks before fixing what isn't broke.

Wally39

That's what gave out in mine is the 3rd gear. Started slipping bad. All fixed now

modaddict

Good advice but you do have limits. I don't know about Jr.'s car but the blue car may be on the stock tranny but I'd bet you have no clue how many stock tranny's it's gone through...lol

Many vendors will continue to use (and break) stock parts so they can use the claims in their advertising to make sales. I'm not singling out JDM and they've done nothing wrong cause they ALL do it. But don't take what a shop car has done on the 'stock' parts too seriously cause they have the luxury of replacing those stock parts dozens of times if need be. Those cars are advertising cars, never forget that. You are not going to be able to run 9's (or even 10's for that matter) consistently on the stock trans and the average joe is not going to want to replace it every other month either...

I do agree though that with some minor upgrades you should be able to get your stock tranny handling 10 psi stoutly. Just remember that you will always here about what a shop car does but will rarely hear about what it breaks...

MexGT

I already have a PI multi disk TC and a Performance Automatic oil tranny pan (1 extra galon of tranny fluid!) but as far as i'm concerned those mods are only to keep the tranny cool, but i´m talking about the inside components of the auto-tranny, are they good for a 10psi DD stress? 12 psi ?

Or does the TC + deep tranny oil pan will be "ENOUGH" to keep an automatic safe for 10 - 12 psi ? as a DD.
Im talking only about the tranny... i know that for 12 psi i´d need forged internals most likely.

nem

most of you have probably seen this. they will sell the tranny or rebuild kit

http://www.nmratv.com/index.php?stre...mp;playlist=32

modaddict

That's kind of a loaded question cause the answer is suggestive to exactly how hard you beat on it. You are already on the right track cause heat is definitely the primary destroyer of transmissions even though many think it's stress.

I know quite a few guys running in that psi range on the stock trans with the PI converter and PA pan and are doing fine but on the same token, I know two guys who snapped the input shaft in that range. IMO, you are good to go and if you see any problems, my bet is it would be with the input shaft but it's not like it's made of cardboard either, and you have to really twist that thing to break it. I think your TC and pan will hold you were you're at for awhile. Keeping the tranny cool is the key to longevity and that goes for any type of trans.

I use the largest pan made and 2 trans coolers with fan packs on all the time with my 4r70. Full manual, with no lockup, and a small 9" converter - it's the only way I can keep it streetable with big power. Otherwise, I'd be pulling over every 20 miles to cool it down... Every trans I have ever smoked was first related to heat and the excessive heat is what caused everything else to break. Keeping it cool is the secret...[8D]

06Saleen3V

This is not true...the stock blocks onour cars are very strong (capable of 800+hp)...the rods are what limit us first, they are the weak link

drbobvs

No, I have not seen that! Good info! It's gotta be cheaper than Level 10's.

MexGT

After watching that video I just mailed TCI asking for the trans rebuild kit ! lol

hotairgypsy

man i have not rebuilt a tranny in years...i wonder how much the swap is