Tranny Question
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Posting Guru
Joined: Feb 2007
Posts: 1,146
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From: Bradenton FL
Tranny Question
Has anyone of us ever rebuilt thier transmission?
I know most go to a BTS when thier stock one goes south, i was wondering if anyone has any opinions on rebuilding their tranny with better TC, pump, VB and other goodies.
Im curious because i cant tell if its slipping under a BIG load or not, under normal conditions it works great, tonight i jumped all over it going around a corner and i couldnt feel or hear my 37s burnin pavement but my rpms seemed to jump up earlier than usual like it slipped in 2nd gear.
I suppose i should ask what are the symptoms of a slipping TC?
And/Or can anyone on here with moderate mods burn down 37s with 3.73 gears while rolling
I know most go to a BTS when thier stock one goes south, i was wondering if anyone has any opinions on rebuilding their tranny with better TC, pump, VB and other goodies.
Im curious because i cant tell if its slipping under a BIG load or not, under normal conditions it works great, tonight i jumped all over it going around a corner and i couldnt feel or hear my 37s burnin pavement but my rpms seemed to jump up earlier than usual like it slipped in 2nd gear.
I suppose i should ask what are the symptoms of a slipping TC?
And/Or can anyone on here with moderate mods burn down 37s with 3.73 gears while rolling
Senior User
Joined: Jul 2006
Posts: 226
Likes: 0
From: Brighton, CO
My understanding is that you can do a good build, stronger clutches, etc, but the stock case will be the weak point. The center support is aluminum, I think, which can fail. My tranny just quit, bad accumulator valve stuck and smoked the clutches. But there were also aluminum pieces in the filter, and a buddy of mine whose some kind of freaky genius with autos thought that they came from the center support. Don't know about the internals of a BTS or anything, if they use stronger cases. Maybe someone will chime in?
Joe
Joe
Last edited by JoeTrotter; Sep 2, 2007 at 09:26 PM.
Logistics Pro
Joined: Mar 2002
Posts: 3,881
Likes: 84
From: Wake Forest, NC
You must have a couple of specialized tools to reassemble the trans. It can be taken apart without them, but not put back together. I tore into one once, but had a trans guy do most of the reassembly. He had some makeshift tool for installing the rear geartrain, but at 50lbs, I'd rather have the real tool.
The center support can cause issues, the updated part is a roller part instead of bushings. Haven't heard much abou the case being the weak point.
There are several upgrades you must do. Not sure about the newer 4r100's with the mechanical diode setup, but the older ones you want to update the sprags, get the improved clutch material and increase the number of clutches. I would also recommend a new ford HD pump. There are some hard parts to upgrade on different years as well, but that applies mostly to the older ones. There are billet parts and hardened shafts but depending on powerlevels not sure how much they are really worth doing. THe biggest thing is to get the better clutch packs installed and a reprogramming kit for the valve body and accumulator pack. Also get a new solenoid pack.
The center support can cause issues, the updated part is a roller part instead of bushings. Haven't heard much abou the case being the weak point.
There are several upgrades you must do. Not sure about the newer 4r100's with the mechanical diode setup, but the older ones you want to update the sprags, get the improved clutch material and increase the number of clutches. I would also recommend a new ford HD pump. There are some hard parts to upgrade on different years as well, but that applies mostly to the older ones. There are billet parts and hardened shafts but depending on powerlevels not sure how much they are really worth doing. THe biggest thing is to get the better clutch packs installed and a reprogramming kit for the valve body and accumulator pack. Also get a new solenoid pack.
