Rebuilt Trans shifts wierd - Ford Powerstroke Diesel Forum
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Old 01-21-2010, 05:29 PM
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Rebuilt Trans shifts wierd

So the OBS I just picked up has a rebuilt transmission that was built to factory specs less than 200mi ago by a reputable shop. I have the reciept, and the rebuild was to the tune of about $1600. New TC as well. Amsoil fluid.

The shifting and TC lockup charectaristics are a bit odd. It's not smooth at all. I've done a bunch of searching on this site, and gathered that the PCM tells the trans when to shift, and that the OBS PCM's are shyte. Would a reflash, or upgrade to TDE1 PCM help?

When the TC finally locks in D, the truck scoots! But accelerating at partial throttle can be cumbersome because the TC slips.

Maybe I'm just getting used to driving this, but it seems that the A/T's in these trucks give people fits.

-Matt
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Old 01-22-2010, 08:30 AM
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you are correct sir! that auto tranny in our truck is commonly referred to as a "slushbox". i dotn know anything about the TDE1. but you can improve it with a custom tune chip i believe. you can also upgrad ethe valve body (BTS or John Wood) and i understand that helps dramatically. a triple disc torque covnerter helps and is advised for power or towing but not required.

if you want more info on the VB there was a recent article on dieselpowermag.com about the E40D tranny and John Woods rebuilding.

BTS is jsut as good, and i believe less expensive.
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Old 01-22-2010, 02:36 PM
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What are some good chips, and what does something like that cost? I don't need anything crazy, I'm not making a ton of power or hauling/pulling a lot. I just want something to make it shift better, and don't really want to spend a ton of money.

Thanks

-MK
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Old 01-23-2010, 05:56 PM
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well custom tune chips are your best bang for your buck. they give you substantial power improvements and help with the transmissions shift points. my pcm is the NAW6 and my transmission shifts awesome when you run it hard and shifts sloppy when you dont. thats just the way they work when you rebuild them to factory specs. a shift kit is a cheap way to help it shift better
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Old 01-24-2010, 07:38 AM
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Thanks for the replies. I'm hearing good things about TS 6-pos chips on here and other boards. Not too bad at ~$250. I'll probably end up doing this in the next few months. The trans is more of an annoyance than a problem, and I have a few maintenance items to take care of first.

Thanks again for the info.

-MK
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