Performabuilt or Extreme Automatics?
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I would go with Extreme Automatics for any automatic transmission.
Extreme Automatics is the only real competitor with Rossler, which is a name most are familiar with here.
TH400's in 5 second cars, only two places I know of at that level... Rossler and Extreme.
It's amusing to see how close minded some forums are. If it's not a sponsor they must not know what they are doing. There are quite a few builders who don't need to pay for advertising, because their reputation is good enough they can stay busy without advertising. Extreme Automatics is one of those.
Does the performabuilt have the oversized Sonnax valves?
If I order mine with a 3600 stall, will it be comparable to the Vigilante?
I would go with Extreme Automatics for any automatic transmission.
Extreme Automatics is the only real competitor with Rossler, which is a name most are familiar with here.
TH400's in 5 second cars, only two places I know of at that level... Rossler and Extreme.
It's amusing to see how close minded some forums are. If it's not a sponsor they must not know what they are doing. There are quite a few builders who don't need to pay for advertising, because their reputation is good enough they can stay busy without advertising. Extreme Automatics is one of those.
I am not on either company's payroll. I run my own performance transmission shop, it's not in my interest to "recommend" either company.
Let's just say I have seen some stuff that would definitely make me lean towards Extreme Automatics.
Personal experience you might want to call it, not from a customer's perspective but from a transmission builder's perspective.
I didn't "talk ****" about any company. I could easily do so but I didn't, I merely suggested who "I" would personally go to if I had to choose of the two choices.
"I" would just build my own, so the choices are not valid for me.
I am familiar with Extreme Automatics because I talk to Lonnie occasionally and buy Griner VB's for my high end TH400's. I believe he used to build for one of the sponsors here, and IIRC he isn't really in the 4L60E market anyway, so he may not even want the referral.
They do TH400's for very fast cars and 200-4Rs as their primary business the last time we spoke.
If I ever need a 4l60 built he is the first I would contact. He knows his stuff when it comes to transmissions. I wonder if all the posters here who dismissed him have ever even heard of him.








Performabuilt. Excellent service, bulletproof transmissions.

