MattP Posted November 16, 2012 Share Posted November 16, 2012 Can towing an automatic Supra on the back of a recovery truck whilst the supra is in N damage any part of the Transmission? If so how? Quote Link to comment Share on other sites More sharing options...
LOGIE Posted November 16, 2012 Share Posted November 16, 2012 From what ive read elsewhere you should NEVER tow an auto. Remove the prop maybe? Quote Link to comment Share on other sites More sharing options...
straightsix Posted November 16, 2012 Share Posted November 16, 2012 Towing an auto should only be done with the driven wheels off the ground. A recovery truck should lift the rear wheels on their towing dolly. Quote Link to comment Share on other sites More sharing options...
skyline1 Posted November 16, 2012 Share Posted November 16, 2012 Hmmmm why not though is a big question. id like to know just out of curiousity. Sorry to jump your thread but can Auto's be bump started then? as in like a manual you would roll the car and jump off the clutch while in gear. Quote Link to comment Share on other sites More sharing options...
MattP Posted November 16, 2012 Author Share Posted November 16, 2012 The reason being I had a thread up here a few weeks ago about wanting a new N/A Autobox now as a result of that thread I bought an autobox that was previously on one of my old Supras however that supra was a write-off and was towed in N to a breakers. My point being the Autobox had been running well before and after the accident but after fitting it to my new Supra it feels like it is slipping in 1st gear all the time on pull away. However could this be down to a dodgy torque converter? Quote Link to comment Share on other sites More sharing options...
straightsix Posted November 16, 2012 Share Posted November 16, 2012 (edited) I've not ever looked ito it fully but I know that towing an auto can damage the transmission. Some manufacturers state that it's OK to tow an auto as long as it's in N but speed is not over 30mph. Other manufacturers say it's OK but you have to put extra gear oil in the box. I would imagine Google might turn up a more definite answer as to why you shouldn't do it. I was always told that it damages the torque converter and box due to the possibility of overheating. When I had my Audi quattro, all four wheels have to be off the ground when towing due to the four wheel drive system (something to do with potential damage to the transfer box) and even doing a brake test on the MOT without the correct equipment can damage a four wheel drive system. Skyline1 - an auto cannot be bump started as it has no clutch to give friction. The torque converter is effectively a fluid coupling. Bobski - are you asking because you have to tow a Supra? If so, just do it the right way. You might be lucky enough to not damage the box and TC but then again you might not Edited November 16, 2012 by straightsix (see edit history) Quote Link to comment Share on other sites More sharing options...
straightsix Posted November 16, 2012 Share Posted November 16, 2012 The reason being I had a thread up here a few weeks ago about wanting a new N/A Autobox now as a result of that thread I bought an autobox that was previously on one of my old Supras however that supra was a write-off and was towed in N to a breakers. My point being the Autobox had been running well before and after the accident but after fitting it to my new Supra it feels like it is slipping in 1st gear all the time on pull away. However could this be down to a dodgy torque converter? Possibly - or low fluid? Quote Link to comment Share on other sites More sharing options...
Kaan W Posted November 16, 2012 Share Posted November 16, 2012 Possibly - or low fluid? Could it be as its towed the fronts in the air meaning no fluid up front in the torque converter? Quote Link to comment Share on other sites More sharing options...
garethr Posted November 16, 2012 Share Posted November 16, 2012 Fluid is pumped around the gearbox when the engine is running. If the car is towed (with the engine off) the gearbox is being turned by the rear wheels but the pump is not running. Quote Link to comment Share on other sites More sharing options...
straightsix Posted November 16, 2012 Share Posted November 16, 2012 Fluid is pumped around the gearbox when the engine is running. If the car is towed (with the engine off) the gearbox is being turned by the rear wheels but the pump is not running. Well done that man! Quote Link to comment Share on other sites More sharing options...
Benjy Posted November 16, 2012 Share Posted November 16, 2012 can Auto's be bump started then? as in like a manual you would roll the car and jump off the clutch while in gear. Quote Link to comment Share on other sites More sharing options...
Havard Posted November 16, 2012 Share Posted November 16, 2012 Fluid is pumped around the gearbox when the engine is running. If the car is towed (with the engine off) the gearbox is being turned by the rear wheels but the pump is not running. IIRC. This leads to a build up of pressure that damages the torque converter/bell housing. Quote Link to comment Share on other sites More sharing options...
MattP Posted November 16, 2012 Author Share Posted November 16, 2012 Bobski - are you asking because you have to tow a Supra? If so, just do it the right way. You might be lucky enough to not damage the box and TC but then again you might not.... The answer to that question is no read previous posts^ Quote Link to comment Share on other sites More sharing options...
straightsix Posted November 16, 2012 Share Posted November 16, 2012 Bobski - are you asking because you have to tow a Supra? If so, just do it the right way. You might be lucky enough to not damage the box and TC but then again you might not.... The answer to that question is no read previous posts^ I saw it after posting so know why you're asking now My advice would probably be to source a known good box on here from another member - unless you get your old one back for free and then it will only cost you your time to see if it's OK or not. Quote Link to comment Share on other sites More sharing options...
straightsix Posted November 16, 2012 Share Posted November 16, 2012 Now, now.....we all have to learn somewhere. But I did chuckle a bit myself! Quote Link to comment Share on other sites More sharing options...
MattP Posted November 16, 2012 Author Share Posted November 16, 2012 The reason being I had a thread up here a few weeks ago about wanting a new N/A Autobox now as a result of that thread I bought an autobox that was previously on one of my old Supras however that supra was a write-off and was towed in N to a breakers. My point being the Autobox had been running well before and after the accident but after fitting it to my new Supra it feels like it is slipping in 1st gear all the time on pull away. However could this be down to a dodgy torque converter? Quote Link to comment Share on other sites More sharing options...
straightsix Posted November 16, 2012 Share Posted November 16, 2012 Sorry dude - I'm trying to read all this while kids are arguing and I really ought to be stepping in to sort it! Quote Link to comment Share on other sites More sharing options...
MattP Posted November 16, 2012 Author Share Posted November 16, 2012 (edited) The car I currently have was sold to me with a nackered gearbox so as a result of this I did the following...... *I put up a thread to find a new gearbox. *Bought back a gearbox off my old supra which was low mileage with a new sump filter and worked flawlessly however the guy didnt have the matching torque converter. *I have since had my nackered old box removed and the low mileage one put on with the nackered ones torque converter for the above reason. *The gearbox appears to work better through the gears however it feels like it slips in 1st gear when pulling away from a stop. *The gearbox has the correct amount of fluid in and has been checked using the correct method running in park etc.. Could the problem be the torque converter or is it possible this is a reflection of the gearbox being towed in its previous car? Edited November 16, 2012 by MattP (see edit history) Quote Link to comment Share on other sites More sharing options...
straightsix Posted November 16, 2012 Share Posted November 16, 2012 I would suspect the TC. I'm gutted as I was trying to give one away for months and have now binned it Quote Link to comment Share on other sites More sharing options...
MattP Posted November 16, 2012 Author Share Posted November 16, 2012 Sad face my mechanics face when I tell him it all has to come off again Quote Link to comment Share on other sites More sharing options...
straightsix Posted November 16, 2012 Share Posted November 16, 2012 Maybe you should stick a wanted ad up for a Torque converter - As I said, I couldn't give mine away but someone might have one that they might want rid of. Quote Link to comment Share on other sites More sharing options...
MattP Posted November 16, 2012 Author Share Posted November 16, 2012 This supra has been nothing but hassle since I got it ive had it one year and everything that can go wrong has gone wrong Quote Link to comment Share on other sites More sharing options...
Jamesy Posted November 16, 2012 Share Posted November 16, 2012 I would never tow an auto supra at all ... Get it on a proper truck mate Quote Link to comment Share on other sites More sharing options...
straightsix Posted November 16, 2012 Share Posted November 16, 2012 This supra has been nothing but hassle since I got it ive had it one year and everything that can go wrong has gone wrong But is the transmission/TC the only problem now though? Quote Link to comment Share on other sites More sharing options...
MattP Posted November 16, 2012 Author Share Posted November 16, 2012 No My engine holds oil for about a week before it burns the lot off cant find any leaks Quote Link to comment Share on other sites More sharing options...
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