I just got my bro's car running great: Diesel Purge results: This is amazing stuff!
The car is a 1991 300D 2.5 turbo with 91,XXX original miles.
Today on my way to church, about a block before arriving, the trans went into neutral after shifting out of first. I put it in neutral and back in drive, and it shifted into second and then third just fine. After church, I exited the parking lot and it went into neutral every time after shifting from first. I then drove the remaining 14 miles home in first gear, accelerating and then coasting until the governor caught up with the wheel speed and it went back into first (I did this probably 35 times on the trip home).
I have a basic understanding about how an automatic trans works, so I have an idea what could have gone wrong. It has only reverse and first. I believe that the problem is a broken sprag, but that is where you the trans expert comes in. When I got home, I checked the fluid level thinking that it may be just low, but I was surprised to see that it was in fact over full by at least a quart. I talked to my bro, and he said the last time he checked it it was just right (no leaks in the trans). Could the over full condition be caused by expansion of the fluid? Could the over full condition be the cause of the trans only having first and reverse?
I must add that while the engine was having problems with power or the lack thereof (see above thread), the trans would shift really hard in every gear. I checked the modulator and it holds pressure. When the engine is lacking power, the pedal is always to the floor and the modulator sees no vacuum. If I give it easy throttle or let off totally, it would shift smooth, but had no acceleration. After fixing the fuel problem yesterday, it shifted just fine until this morning. Could the hard shifting have contributed to this trans problem? Any diagnosis (expert or otherwise) will be appreciated. I don't want to have to pull and have the trans rebuilt/fixed if I don't have to. Thanks in advance, Rich

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All Diesel Fleet
1985 R107 300SLD TURBODIESEL
2005 E320 CDI (daily)

LOTS of parts for sale!


EGR block kit
http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html

1985 CA emissions 617 owners- You Need This!
Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst.

Sanden Instalation Guide (post 11):
http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html