Cummins Diesel Forum banner
Cancel

68rfe issue when shifting

821 Views 6 Replies 3 Participants Last post by  r4360, 
R
I had my '07.5 2500 MCSB worked on recently with the full deletes, 5' tbe, anarchy efi live installed. I use the street mode on the efi. The issue I have is when i'm WOT the tranny seems to derate when it shifts. I was thinking that this might be normal as it would do this to save itself while shifting. I had a '07 5.9 that I bought brand new and it didn't do this, just ripped through the gears smoothly.Is there something with the 68 rfe that lets the power off right at shifting or is there something else amiss with it? Side note the efi is awesome and the truck had 68,000 when work was done. Bought it used with 64,000 on it. It towed 5th wheel before i got it. I don't tow but once and a while will get on it.

Thanks.
Reply
Save
Like
1 - 2 of 7 Posts
S
Did you get your TCM tuned also? If not, call Anarchy and stop the full throttle blasts before you slip the overdrives.
Reply
Save
Like
S
Call or PM Anarchy. They'll hook you up.

The 68rfe transmissions are expensive. Go easy on it if it's stock.

I don't remember if you put head studs in or not. Make sure you have some heat in the engine before you put your foot in it.
Reply
Save
Like
1 - 2 of 7 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Cummins Diesel Forum
A forum community dedicated to all things Cummins Diesel! Originally founded for owners and enthusiasts of Cummins powered Dodge pickups, the Cummins Forum has expanded to include ALL Cummins Engine applications! Come join the discussion about reviews, drivetrain swaps, turbos, modifications, classifieds, builds, troubleshooting, maintenance, and more!
Full Forum Listing
Explore Our Forums
03-07 Performance Parts Discussion 03-07 Powertrain 2013-2018 General Discussion 98.5-02 Powertrain 98.5-02 Performance Parts Discussion
Top