Regearing, Computer reflash?

[BigRam14]

I've been reading all morning threads on here about regearing. But most have to do with the old 5.9 or the new aisan trans. I have a 14 3500 crew long 6.5 inch suspension lift. Run 37/13.5/22s since its had 18k on it. Trans broke input shaft at 105k on a sledding trip out west in feb 2020. Installed a jasper trans, lasted 4500 miles, 2nd jasper lasted 300 miles, now have about 500 on this one. The originally had 68rfe and 3.73 gears The truck shifts really fast and often so thinking of goin to 430 or 410 depending on if I have to change the carriers or not. Have a couple shops saying it could throw the truck into a limp mode like the jeeps do and may need to have the dealer reflash. Now I'm lost lol. Any input would be greatly appreciated!! Alot of knowledge on here, ty for letting me be apart of it!

 

[BigRam14]

Should have added i dont tow alot 5-6 times a year. Sometimes across the country. My toy Hauler is 22k lbs with the bike in back. 5th wheel

 

[BigRam14]

I've been reading all morning threads on here about regearing. But most have to do with the old 5.9 or the new aisan trans. I have a 14 3500 crew long 6.5 inch suspension lift. Run 37/13.5/22s since its had 18k on it. Trans broke input shaft at 105k on a sledding trip out west in feb 2020. Installed a jasper trans, lasted 4500 miles, 2nd jasper lasted 300 miles, now have about 500 on this one. The originally had 68rfe and 3.73 gears The truck shifts really fast and often so thinking of goin to 430 or 410 depending on if I have to change the carriers or not. Have a couple shops saying it could throw the truck into a limp mode like the jeeps do and may need to have the dealer reflash. Now I'm lost lol. Any input would be greatly appreciated!! Alot of knowledge on here, ty for letting me be apart of it!

Fully deleted with Anarchy tunes. Approx 600 hp.

 

[MikeXM]

I'm not 100% sure about yours but on the older models you could change the gearing yourself with a tuning programmer.

 

[BigRam14]

I'm not 100% sure about yours but on the older models you could change the gearing yourself with a tuning programmer.

Yes 2006 and older I do believe. Dealer says no reflash but maybe something about abs?

 

[Deleted member 80]

Can't speak to the reflash, but a stock 68RFE or crappy rebuilt is not going to stand for a 600 HP tune. You are wasting your $$$ and time. Call Goerend and see about a properly built trans, and those problems will be behind you.

 

[MikeXM]

Can't speak to the reflash, but a stock 68RFE or crappy rebuilt is not going to stand for a 600 HP tune. You are wasting your $$$ and time. Call Goerend and see about a properly built trans, and those problems will be behind you.

I missed that part. I totally agree with @1HasBeen. Final ratio isn't going to fix anything for your immediate problem. I thought you were just unlucky. But no, 600HP is gonna torn apart that 68RFE with no end to it. Gotta fix the trans first.

 

[elephantrider]

goerend would be who I'd call, in your situation.

 

[BigRam14]

Can't speak to the reflash, but a stock 68RFE or crappy rebuilt is not going to stand for a 600 HP tune. You are wasting your $$$ and time. Call Goerend and see about a properly built trans, and those problems will be behind you.

 

[BigRam14]

Odd because stock trans lasted from 50k to 105k with the delete and tune but these jasper trans are supposed to be good for up to 800+ hp and they're junk! And 9500 bucks installed

 

[BigRam14]

Odd because stock trans lasted from 50k to 105k with the delete and tune but these jasper trans are supposed to be good for up to 800+ hp and they're junk! And 9500 bucks installed, jasper is known nation wide for their transmissions and engines

 

[Deleted member 80]

I have had their engines apart at my buddy's machine shop years ago. Not impressed. The results speak for themselves.

 

[BigRam14]

I have had their engines apart at my buddy's machine shop years ago. Not impressed. The results speak for themselves.

Thats a bummer to hear.

 

[Squatch]

Yeah man, Ive heard a lot of bad things about jasper. Get a beefed up tranny from people who specialize in making them bulletproof.

 

[LateToTheParty]

Mine's a Hemi, so can't provide any input on the trannies, but when I moved up to 37s on my 2016, as I was changing TPMS settings and Tire Size in AlfaOBD, I do recall there was a setting for gear ratio.