s2konroids

I've had a set of 4.56r gears in my final drive for 5-6 years now, unfortunately i 'think' the diff is on its way however i dont think the ring and pinion is damaged which is what you get in a final drive set - my friend reckons its not the noise he would associate with damaged teeth so the ring and pinion will likely be fine.

The final drive wasn't cheap and it would be a shame to get rid of it and it helped a lot NA, however i think because the car sits 300-500rpm higher in each gear and you have to change more often its actually limiting the performance of my car since its boosted its an AP1 (CTSC+AC@10psi with bolt ons) and circa 330BHP/210 lb-ft torque @ the wheels and believe the spread of torque is affected so other than standing start low gear situations its decremental for my performance.

I think i'd prefer better performance from a roll/dig rather than standing starts/very very low speeds.

What do you folks think? can you explain?

I'm not into standing starts, 1/4 miles so perhaps going back to 4.10 would be better on the road and from a shift down when wanting to go 'some'.

I may try and salvage the final drive or just replace it.

I've now embargoed the car whilst i decide what I'm going to do.

Batbite

IMHO....

If you plan on staying at or below the 330-HP mark, I would keep the 4.56's providing they are still in good shape. I had a set of 4.57's for years when I had my CTSC setup (315-HP)....and I think that the gears were one of my favorite & most useful mods, and deifitely made the car a lot more fun to drive around town.

When I changed from the CTSC...to the Turbo, and added +215-HP, I went back to the 4.10's

Goodluck

s2konroids

Sure are more fun, but i just want to know if the car will be faster from a dig and in gear without the 4.56r's.

Thanks

Moddiction

From a roll the gears will be hurting you I'm pretty sure. Even NA with the 4.77's they really felt like they were hurting my acceleration.

With boost especially 10+ psi they will hurt you.

I'd ditch them and get some stock gears back in there.

s2konroids

Yup thats what i was thinking

05TurboS2k

Keep stock gears unless your motor is bone stock. Anything over 20whp gains and I start thinking that shorter gearing is a mistake. Hell I'd prefer taller gearing in my turbo car, I can spin most anywhere in 1st or 2nd gear, why go taller? So I have to shift more and then can't get past 155mph? No thanks.

-Greg

SlowTeg

I can't imagine boost with shorter gears, especially on an ap2. If anything I'd want a taller FD in my ap2 if I had boost.

camuman

Agree

s2000Junky

Go back to 4.10 AJ. You know that's my consensus after we spoke.

s2konroids

Gone back to 4.10 over the weekend it feels slower for sure low down.