Tranny — Rear wheels spin opposite

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Greg Bryan
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Re: Tranny — Rear wheels spin opposite

#16 Post by Greg Bryan »

If two gears get engaged at the same time, which I have seen, it would exhibit these traits. The gears won't turn therefore the car will be locked up, the diff side gears and spider gears will spin the wheels in the opposite directions when raised off the ground. Of course, other things can lock up the trans, all consist of serious damage.
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Martin Benade
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Re: Tranny — Rear wheels spin opposite

#17 Post by Martin Benade »

That sounds ok if his aim is to transport the car, although a flatbed would be easier. My guess was he wanted to tow it a short distance to see if it would free up, then put it back in the garage and continue working on it.
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Vic Skirmants
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Re: Tranny — Rear wheels spin opposite

#18 Post by Vic Skirmants »

A story from my very distant past: Owner said the car wouldn't move after a short drive and parking it for a few minutes. Towed it forcefully; it freed up, and a large pool of oil appeared underneath.
Turns out that the pin holding the differential side gear shaft had come out. When he stopped the car, the shaft slid out and then locked the diff against the back wall of the transmission. Forceful towing caused the shaft to break and punch a large hole in the back wall of the trans.

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Re: Tranny — Rear wheels spin opposite

#19 Post by Geoff Fleming »

Maybe the shifter is locked against some obstructionand the trans. Is o.k.
Get under the car, undo the safety wired screw that links the shift rod to the trans. Now see if the trans can be worked without the shifter attached.
I assume there is no trans. lock being used, as ghis will prevent the shifter from moving. You never know.

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Jacques Lefriant
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Re: Tranny — Rear wheels spin opposite

#20 Post by Jacques Lefriant »

Hi Tim
it may be stuck in reverse since the idler gear may be stuck to the shaft which is high in the nose cone and did not get any oil.
j
 

Timothy Frost
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Re: Tranny — Rear wheels spin opposite

#21 Post by Timothy Frost »

Doing the wise thing. Dropping the tranny and making as assessment. Will post results of inquiry.

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Harlan Halsey
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Re: Tranny — Rear wheels spin opposite

#22 Post by Harlan Halsey »

Orient point is where the Long Island terminus of the New London Ferry was. 3 ferries to get to Bridgehampton from Boston. A delightful if somewhat challenging trip, particularly Sunday night. The cross-sound ferries were WWII LSTs.

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Re: Tranny — Rear wheels spin opposite

#23 Post by Timothy Frost »

Can someone steer me to the “best and most complete” video for removing the transaxle assemble from a 356B. Engine has already been previously removed, Thanks.

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Jim Clement
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Re: Tranny — Rear wheels spin opposite

#24 Post by Jim Clement »

https://s3.amazonaws.com/ClubExpressClu ... 2BfGhgE%3D

check out this section in the workshop manual - not a video
 

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Mark Roth
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Re: Tranny — Rear wheels spin opposite

#25 Post by Mark Roth »

The documents in the website library can’t be linked directly. One has to go through the website. Here’s the factory manuals page in the technical library accessed through the TECHNICAL menu.
https://porsche356registry.org/content. ... _id=508693
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Alan Klingen 2
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Re: Tranny — Rear wheels spin opposite

#26 Post by Alan Klingen 2 »

THe wheels spinning opposite is normal that's how a diff works Alan The Stable.

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Martin Benade
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Re: Tranny — Rear wheels spin opposite

#27 Post by Martin Benade »

But not when you tow it with no engine in.
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Rudy Bernhard
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Re: Tranny — Rear wheels spin opposite

#28 Post by Rudy Bernhard »

Long shot, but sometimes two thing can go wrong and confuse the diagnosis. 30 years of storage, the brake lines swell on the inside. If you push on the brake pedal the fluid goes out, but the springs may not have the pressure to release the brakes immediately given the brake line swelling. With some time, the brakes may slowly release. Symptom is car won't move. Then later it might. Make sure you don't have this problem first. Cheap troubleshoot. remove the brake lines at the wheel to see if that allows movement of the wheel. then move on to the new symptoms.
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Wes Bender
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Re: Tranny — Rear wheels spin opposite

#29 Post by Wes Bender »

If the wheels both rotate in opposite directions when jacked up it can't be the brakes.
Some days it's just not worth chewing through the restraints.....

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