When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
this morning i replaced the solenoid pack in my 94 Lightning after a suspected failing EPC in the old pack. The reman pack (from cobra transmission) bolted right in and was a smooth install. however, now reverse engages extremely harsh, but drive engages a bit softer than usual. in order to move about an inch in drive, i need to rev to about 1500, but in M1 and M2 moves as it should. Worth noting all was normal except for that failing EPC before i replaced the pack. fluid is bright red and at level. there was no major clutch material on the magnet. i suspect this is just a case of bad parts but im willing to hear what you guys think. TIA
You suspected this was the problem.
Did you test it?
What part number is form cobra transmission?
the old solenoid pack ohm tested in at around 4.5 ohms, which was in spec, but i’m pretty sure mechanically it was failing, as i’d get intermittent high rpm shifts. i reached my conclusion of the EPC being the culprit after narrowing down every electrical component in the trans. Cobra PN is #36420R
@straighsixconvict Did you follow the ATSG manual to a T when you rebuilt it?
Did you put any of the up-gradable hard parts in?
Did it previously have a shift kit in it?
Did you put a shift kit in it?
Your VSS signal is strong and stable?
No bad grounds, open grounds?
You were having many of these similar electrical issues with the previous E4OD before you cooked it.
Did you solve all the previous issues?
the old solenoid pack ohm tested in at around 4.5 ohms, which was in spec, but i’m pretty sure mechanically it was failing, as i’d get intermittent high rpm shifts.
Did you apply 12V to it to test its function?
My guess is that you have an electrical issue more so than a trans issue.
@straighsixconvict Did you follow the ATSG manual to a T when you rebuilt it?
Did you put any of the up-gradable hard parts in?
Did it previously have a shift kit in it?
Did you put a shift kit in it?
Your VSS signal is strong and stable?
No bad grounds, open grounds?
You were having many of these similar electrical issues with the previous E4OD before you cooked it.
Did you solve all the previous issues?
Yes. all previous issues were solved and the only lingering issue was the intermittent high rpm shifts. no shift kit, as far as i know everything is stock. all grounds were cleaned off and the VSS has a good solid signal.
You were having many of these similar electrical issues with the previous E4OD before you cooked it.
Did you solve all the previous issues?
this is the same trans that i allegedly cooked. to my suprise. there is no signs of clutch material or metal shavings on the magnet.
fluid looks a little dark but i’m pretty sure it’s just due to wear.
i found the issue. the plug wasn’t seated in all the way since part of the old plug was still on the connector. plugged it in and shifted good, until it didn’t. for whatever reason now in D it’ll only upshift unless i let off the gas. if i shift from M1 to M2 it shifts flawlessy, but when i go to drive it just neutrals until i let off the gas, then it finds a gear.
i found the issue. the plug wasn’t seated in all the way since part of the old plug was still on the connector. plugged it in and shifted good, until it didn’t. for whatever reason now in D it’ll only upshift unless i let off the gas. if i shift from M1 to M2 it shifts flawlessy, but when i go to drive it just neutrals until i let off the gas, then it finds a gear.
It is fixed with the plug? Or there is still an issue? Or a new issue?
It is fixed with the plug? Or there is still an issue? Or a new issue?
plugging it in fixed the issue, then that new issue arose. it’d almost as if the truck neutrals when i go to D then finds a gear. i heard the MLPS can cause weird issues like this. how can i verify its alignment and function?
Which ‘plug’ connector, just to make sure we’re all on the same page? The MLPS (TRS) or the Solenoid body?
You need to pull the shift lever off and verify it. Here’s a pic, courtesy of Steve at Supermotors. You need to make sure the alignment notch is aligned. Was it recently removed or replaced?
Which ‘plug’ connector, just to make sure we’re all on the same page? The MLPS (TRS) or the Solenoid body?
You need to pull the shift lever off and verify it. Here’s a pic, courtesy of Steve at Supermotors. You need to make sure the alignment notch is aligned. Was it recently removed or replaced?
i’m talking about the plug to the solenoid pack connector. If you guys bear with me i should be able to check the MLPS in a couple days or so since i’ll be out of town. My issues are so intermittent. on my way to work it shifted just fine, but on my way home it started acting up again. in order to get to speed properly i have to shift through M1 and M2 then drive then let off the gas, and it’ll catch third. I turned the truck off then on then the issue went away and shifted normally. weird.
