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Registered
Join Date: Sep 2004
Location: Burlington, Ontario
Posts: 631
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901 Transmision working backwards
Hi , this transmission is in a 914 but I thought I'd try over here.
I have a spare 901 (side shifter) I had no history on so I sent it to a reputable guy to have it checked over. He dissasembled it all and found no issues. Put it back together with all new gaskets and seals. I just installed it and I'm having some wacky issues. 1st is where reverse should be and vice versa. It appears I have one forward gear and 5 reverse gears. Anybody seen this before or have any ideas. thanks, Joe |
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07-23-2012, 05:58 PM
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Registered
Join Date: Jan 2003
Location: Burford, ON, Canada
Posts: 2,322
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Maybe he flipped the diff.
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Keeper of 356, 911, 912 & 914 databases; source for Kardex and CoA-type reports; email for info Researching 356, 911, 912 & 914 Paint codes, Engine #'s and Transmission #'s Addicted since 1975 |
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07-23-2012, 06:08 PM
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Join Date: Nov 2000
Location: Manchester, NH
Posts: 268
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He put the ring gear/diff in after the pinion instead of before. Basically, he flipped the transmission. If it was in a 911 it would be fine, but in the 914 it's on the wrong side. The tail cover has to come off and the intermediate plate with the pinion on it taken out, then the diff. put in, then put the intermediate shaft and tail cover back on.
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07-23-2012, 06:16 PM
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83 911 Production Cab #10
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Australian model!!!
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Who Will Live... Will See  83 911 Production Cab #10, Slightly Modified: Unslanted, 3.2, PMO EFI, TECgt, CE 911 CAM Sync / Pulley / Wires, SSI, Dansk Sport 2/2, 17" Euromeister, CKO GT3 Seats, Going SOK Super Charger |
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07-24-2012, 12:59 AM
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'69 warmrod T
Join Date: Sep 2004
Location: England, UK
Posts: 86
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Quote:
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07-24-2012, 01:16 AM
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Registered
Join Date: Dec 2000
Location: Westport,MA
Posts: 574
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You have a tailshifter shift lever in the car is my guess.
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Art '75 911 US Carrera #390 '74 MGB, AH 3000 BN7 V8, '65 Mustang Fastback, 66 bronco U13 |
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07-24-2012, 05:05 AM
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Join Date: May 2008
Posts: 2,948
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Quote:
I was at an SCCA road race back in the '80s. A newcomer to the E/P group trailered his 914 into the pit area, hopped in, started it up, put it in "reverse" gear to back it off the trailer, and drove straight ahead into the tongue height jack, narrowly missing his tire rack. It turned out that they had finished the fresh gearbox and put it in the car the day before, never started the car or tested anything.
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Keep the Shiny Side UP! Pete Z. |
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07-24-2012, 07:58 AM
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Join Date: Feb 2003
Location: Kailua, Bend, & Tamarack
Posts: 1,618
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I haven't heard the accidental reversed ring gear story in awhile .. always good for a chuckle. In college (Denver), a couple guys towed their VW van to a junk yard which allowed them to install a purchased transaxle on site. (The early vans of course have a reversed ring gear because of their reduction gears.) You guessed it .. it was late afternoon when they finished, with no time to do the job over .. so they drove it home backwards ON THE FREEWAY.
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07-24-2012, 08:25 AM
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muck-raker
Join Date: Jan 2009
Location: Coastal PNW
Posts: 3,059
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haha, I had a friend rebuild his VW trans about 30 years ago with this same result, I laughed my ass off. I would scream that old Elvis Costello song "5 Gears in Reverse" at him whenever he put it into gear.
He knew exactly what he did (reversed ring gear). Pulled the trans again the next day, 24 hours later had it back in working perfectly.
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STONE '88 Cabriolet, using EP Slick 20w50 partial synthetic Snake Oil...just as Rommel intended.  Deny Everything; Admit Nothing; and Always Make Counter-accusations 
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07-24-2012, 06:11 PM
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Join Date: Feb 2003
Location: Kailua, Bend, & Tamarack
Posts: 1,618
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Poor Joe probably isn't as amused as us. Sorry Joe .. we definitely aren't laughing at your frustrating situation. It's just that it brought back memories that had to be shared to keep things light. Most of us have been there at one time or another ..
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07-24-2012, 06:35 PM
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I have to share this one in the general spirit of mirth. Before I discovered Porsches I was a Hot Rodder and our club entered a downhill trolly derby. We quickly welded up a cart using enormous drag slicks etc in a mini dragster, complete with rack and pinion steering. When we fronted up to the start line of the very steep and very twisty hill road we discovered the rack and pinion was installed upside down, so turning the steering wheel left turned the cart right. We all thought no problem, simply turn the wheel opposite to the direction you need to go. The brakes were 'dodgy as' and it all ended badly, once you get up some speed and hit a bump you go into auto reaction mode. It was a wonder we did not kill a spectator or ourselves.
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1972 911T Coupe with a '73E MFI engine and 'S' pistons 10 year resto mostly completed, in original Albert Blue. ***If only I didn't know now what I didn't know then*** |
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07-24-2012, 10:42 PM
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Join Date: Sep 2004
Location: Burlington, Ontario
Posts: 631
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No Problem guys, have as much fun at my expense as you like. What I find really frustrating though is that all the problems that I seem to encounter are out of my control. Just previous to this I had my wiring harness fry. Finally tracked it down to a short in the freshly rebuilt alternator. Seems they don't test it with the 914 back on. The washers they use on the terminals were too large and shorted on the cover. A lesson to you always test out any new wiring for shorts before turning the key.
914 and 911 guy, not taking sides yet. |
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07-27-2012, 10:30 AM
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Das Babe
Das Babe Metalberiech
1972 Porsche 911T
