Allison 6sp: WOT downshifts

[8100 Power]

My trans has been built for a few weeks now. The only problem I seem to be having in light throttle shifts it flares and after a WOT run , when you slow down the trans will downshift VERY hard. I'm also getting a delay between shifting from Park to Reverse, and then a clunck to follow, but it only does this every so often.

I reset the TAPS today via EFI Live, hoping it will get better. I've only done about 3 WOT runs since the reset.

Anyone else experience this? I've got a Suncoast IV/1056.

 

[sweetdiesel]

My trans has been built for a few weeks now. The only problem I seem to be having in light throttle shifts it flares and after a WOT run , when you slow down the trans will downshift VERY hard. I'm also getting a delay between shifting from Park to Reverse, and then a clunck to follow, but it only does this every so often.

I reset the TAPS today via EFI Live, hoping it will get better. I've only done about 3 WOT runs since the reset.

Anyone else experience this? I've got a Suncoast IV/1056.

light throttle shifts can make a big difference even with 5mm3 The hard down shifts is...well is odd after it's learnt IMO and shouldnt happen, But flared is a easy fix

the delay in park to shift? Is it possible that it is the prndl? I have swapped many trans and you might need to adjust the cable

 

[Mike L.]

Find someone with a Tech 2 and go through the fast learn process.

 

[8100 Power]

light throttle shifts can make a big difference even with 5mm3 The hard down shifts is...well is odd after it's learnt IMO and shouldnt happen, But flared is a easy fix

the delay in park to shift? Is it possible that it is the prndl? I have swapped many trans and you might need to adjust the cable

It sometimes delays or if it does go in normal it jerks REAL hard, and then sometimes it's completely normal...

When I first reset it after picking it up, I just clicked the first button on the DVT tab in EFILive instead of all four like I've read. It seems to be doing a alot better so far..

 

[8100 Power]

its clunking because the garage adapts didnt get reset. you can only do this with allison DOC or a tech 2.

ben

Not to derail another thread, will this improve my Park--> reverse clunk and jerk?

 

[Mike L.]

Not to derail another thread, will this improve my Park--> reverse clunk and jerk?

Set the garage TAPs.

 

[8100 Power]

Set the garage TAPs.

Thank you Mike.

 

[MaxPowerLB7]

Mine has clunked when the tranny is warm when shifted into reverse on this build. Never when cold just when its warm. I have assumed that it's the pressure manifold. Garage taps didn't fix mine, but may well fix yours.