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Thread: All gears gone, except 4th.
07-29-2019, 12:08 AM #1
All gears gone, except 4th.
Need some advice or help or, well something.
I was driving down the highway some time ago, when the horrible smell of burning transmission fluid washed over me and 5th gear turned into what felt like a Neutral. I shifted to 4th and didn't shift again until I got home.
As I parked in the driveway, I threw the car into all the other gears, 1st, 2nd, 3rd, 5th and Reverse. Nothing, no movement, only revving as if the car wasn't in gear at all. Only 4th did anything. The clutch had been slipping a bit for a little while before this, and as dumb as I was, l let it go since I didn't drive it much.
The car has been sitting for the better part of 2 years now, as I have not had the time or energy to get around to it, but now I do and I'm looking for a solution.
What are my chances the transmission is salvageable in any way? Perhaps it's fixable, or maybe it's just the clutch? Is it possible to be rebuilt, or should I look into finding a working transmission?
What are your guys' thoughts? Car in question is an '85 CS with a 5 speed transmission.
Thanks in advance.
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07-29-2019, 01:48 AM #2
Buy another transmission, that one is done..
Odds are the countershaft bearings are flat gone and the counter shaft is no longer in contact with the main shaft in any meaningful way. The results are catastrophic and it will be less expensive to just buy a working Toyota 5 speed. OR the countershaft broke.. OR the input shaft gear teeth are stripped off. All of these situations are unfortunate and just a symptom of old transmission with out enough oil. Likely you lost an oil seal due to age and all the lube went byby..
You do have options outside of the strict "Supra" transmission.. The Supra uses the W58, this series of transmission is also used in the 4 Cyl Toyota Celica and Toyota pickup.
The 5Speed manuals from the Celica of the same era are the same W58, and I do believe the gear ratios are the same; you should check.. As for the rear end diff gears, these are different so the speedometer tail housing gear is different; you will need to swap this if you get one of these.
The 5 speed manuals from 82?? to 95 Toyota Pickup trucks are are a W56 or G56 and are similar enough you can use them if you are not worried about keeping the exact gear individual gear ratios. Just like the 4 cyl Celica the rear end gears in the Pickup are different and you will need your Supra tail shaft speedo gear so that the speedo is accurate.
If you do source a 5 Speed from a Toyota Celica 4cyl or a Toyota Pickup 4 cyl you will need to be sure to use your old bell housing, the 4 cyl bell housing is different, but the transmission will bolt up to the Supra housing no problem.
07-29-2019, 06:53 AM #3
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07-29-2019, 07:53 AM #4
Drain the trans fluid and see whats what. If you see metal coming out, get another trans.william
Black 84 7mgte/R154, MS2, truetrac, bbk, etc...soon to have 2jzgte and t56
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07-29-2019, 11:31 AM #5
07-29-2019, 04:06 PM #6
07-30-2019, 03:41 PM #7
Yeah 4th is a direct drive gear so it sounds like something pretty catastrophic. I would just replace the transmission with a known good one and put in good fluid like MT90. And do the clutch of course.'84 P-type, 5spd, Super red, black/grey leather - 2JZGTE swap, Precision 6262 on cast manifold, ECUmaster black with 875cc/min injectors, 465 WHP at 17 psi, built R154 with OS Giken twin plate, one piece driveshaft with 1310 joints, Truetrac with 3.73 R&P, 450 lb/in front coilovers, 300lb/in rear springs, Image BBM wheels 17x8 and 18x10, 4 corner BBK, AGX shocks, Whiteline bars, poly bushings, T3 GTX2 front control and steering arms etc. etc.
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