Upgrade from stock... Jasper - Chevy and GMC Duramax Diesel Forum

Transmission Shop Discuss the Allison OEM, aftermarket, and the ZF-6.

 
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post #1 of 9 (permalink) Old 06-02-2010, 11:25 AM Thread Starter
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Upgrade from stock... Jasper

Still in the process of getting my mind straight on what to do!! Have talked to George (Big Dipper) and am convinced I will go to him. But for the heck of it, stopped by a local speed shop owned by a friend of mine, whom I respect immensely. He instantly took off on talking about Jasper transmissions and that all the Suncoast trans start out as Jaspers??? Additionally, he said the Jasper will handle more then I will ever throw at it (they will custom build to what I need)?? Has anyone ever had any experience with a Jasper built trans?? Not planning on going that way, just wanted to know what you all thought of them???

07 LBZ, 8" Fabtech Lift, 37" Toyo MT, 18" Moto Metal 956, Dual loop w/Fox Shocks in front
EFILive by Rob, Billet 4094, Trans by "Big Dipper", Air Dog II, 4" MBRP, Cat & Muff Deleated, MBRP Down Pipe,
Banks CAI with Scoop (modified for tire clearance),
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post #2 of 9 (permalink) Old 06-02-2010, 11:30 AM
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imo just go with George, they sell Jasper trans at Autozone???

trust a guy who has built tons trans that have held.

built motor, big turbos, built trans, etc all by me, parts from Elite Diesel

1016 hp

7.1 1/8 @ 100

11.27 @ 105
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post #3 of 9 (permalink) Old 06-02-2010, 11:34 AM
saw what you did there
 
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never heard of anyone mentioning Jasper anything on the forums.

George. hands down.

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post #4 of 9 (permalink) Old 06-03-2010, 05:57 PM
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never heard of anyone mentioning Jasper anything on the forums.

George. hands down.
X2 :rockin

08 GMC 2500
Efilive by Rob at Atp with Mpi twins and a BigDipper tranny.:rockin
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post #5 of 9 (permalink) Old 06-03-2010, 07:44 PM
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jasper. haha...right.

Go with george and dont think twice/look back.

ben

06 audi S4, V8/6spd
05 dmax/allison...always testing something new


-BT DieselWorks, LLC-

[SIZE="3"]Specializing in a wide range of custom electronics and great gadgets for your 2001+ GM full size truck/SUV

Allison torque converter lockup controllers, Allison Tap-Shift kits, digital DSP-5 switches, affordable injector harness repair kits, and much more!

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post #6 of 9 (permalink) Old 06-04-2010, 09:54 AM
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Jasper is no better than stock at best. Go with George.
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post #7 of 9 (permalink) Old 06-04-2010, 10:08 AM
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jasper high performance allison???? wtf? i dont think they even do high performance stuff...?


2005 GMC 2500 LLY Crew cab long bed 4x4..5" diamond eye exhaust and AEM CAI.
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post #8 of 9 (permalink) Old 06-04-2010, 09:19 PM Thread Starter
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thats what I thought!!! I'll leave the gas motors to him and definately going with BigDipper!!

07 LBZ, 8" Fabtech Lift, 37" Toyo MT, 18" Moto Metal 956, Dual loop w/Fox Shocks in front
EFILive by Rob, Billet 4094, Trans by "Big Dipper", Air Dog II, 4" MBRP, Cat & Muff Deleated, MBRP Down Pipe,
Banks CAI with Scoop (modified for tire clearance),
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post #9 of 9 (permalink) Old 06-04-2010, 09:22 PM
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I've had lots of experience with the Jasper 4L60E in half ton gassers. They are great for that, much better than stock/Goodwrench. But for Allisons, I'd certainly not be a guinea pig.

2004.5 GMC Sierra SLT EC 2500HD 4x4 LLY w/LBZ MP, PCV reroute, EGR blocked, 4" exhaust, PacBrake TR sleeves, DSP5 & EFI-Live w/Idaho Rob tunes
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