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Re:Jimny manual trans problem - G13BB engine

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03 Sep 2019 02:14 #213029 by Riccy
Probably worth checking the condition of the bushes on the stick linkage. That can make for a wobbly or tricky shift.

They are cheap to replace as well. Buy exhaust hangar rubbers for a classic mini. Fit perfectly and stiffens it up well

J999 MNY, ULYSSES M18 VVT with ITB's Dyno tested at 130hp

Pickup/tipper, R7me gearbox & 6.4 Rocklobster, 31" Toyo MT, 2x ARB air locker 3.9 diffs in braced axles, 6" total lift, Floating rear conversion, Raptor painted, CB, Recaro's, Caged, etc, etc...

www.youtube.com/user/riclemus

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03 Sep 2019 02:58 #213030 by Owl
I've given the vehicle over to a reputable gearbox tech to do the deeds.

He did the initial gearbox overhaul, new bearings throughout, new input shaft, and replaced a broken 5th gear, 2nd gear synchro ring was replaced. Seals etc done. Recondition job.

if this works out , that just leaves the case of the screeching belt noise from hell, remains another mystery. Either misalignment or i'm thinking the crank pulley (balancer) might have moved? Don't know yet.

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03 Sep 2019 09:03 #213037 by facade
Just a thought, there is a bearing in the end of the crankshaft that supports the input shaft. If that is seizing it will cause the same symptoms as clutch drag.

If it suddenly breaks, go back to the last thing that you did before it broke and start looking there :)

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03 Sep 2019 09:24 - 03 Sep 2019 09:35 #213040 by Owl
Good point! You mean the spigot bearing , yes that was supposedly changed out at the engine reco stage, Not sure that happened.

The input shaft end where it sits inside the spigot was flogged out so a new input shaft was fitted to gearbox to match the supposedly new spigot. The gearbox tech who has it now is thorough, he will check it. All will be revealed by the end of the week id think. Ive agreed for him to go ahead with the clutch job.

the way it went was the gearbox was overhauled by a separate business, taken over to the engine reconditioners who did the removal and refit. So the gearbox was reconditioned and the tech had no more to do with it.....until now.
Last edit: 03 Sep 2019 09:35 by Owl. Reason: more juicy bits.

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10 Sep 2019 10:32 #213348 by Owl
Hi All. for those interested new clutch kit was fitted, incl. spigot bearing, That fixed the transmission shifting problems. All working fine.

The problem was the original refit of the gearbox was too rough and burred and bent the clutch plate centre spline hole. Half the spline channels were burred and or bent.

The plate couldnt move and was binding to the gearbox input shaft., The moral of the story is, carefully align input shaft, go easy mating the gearbox to the engine. Its a jungle out there.

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10 Sep 2019 15:50 #213362 by facade
Well I've never heard of that before :ohmy: mind you I always make sure that the clutch plate can slide easily on the gearbox splines before I fit the clutch, and line up the plate when I fit it.

Glad it is fixed.

If it suddenly breaks, go back to the last thing that you did before it broke and start looking there :)

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