BigJimnyMeet (North) 2024 (12 Jan 2024)
14th July 2024
Parkwood Nr. Leeds
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Re:Jimny manual trans problem - G13BB engine
- Owl
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Ive tried adjustng clutch pedal free travel and for the clutch to disengage earlier etc, No difference in the problem.
A new clutch was supposed to have been fitted. Has anyone come across this? Ive come across this in other vehicles and its been the clutch pressure plate fatigued, but this supposedly has a new clutch kit installed? Maybe they didnt ?
Anyone had this problem before and found the solution?
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You get used to it.....
Have to say I never thought of going for 4th first in all the years I had mine
If it suddenly breaks, go back to the last thing that you did before it broke and start looking there
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Kirkynut
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- Owl
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A new good brand clutch kit is the prescription. The engine builder was supposed to have put a new clutch kit in, and charged me for a new clutch kit, looks like he must have got the new one mixed up with the old one. be interesting whether the existing clutch is new or not? Ive done under 1000kms on the reco engine so the existing clutch will tell the truth.
I did put some new gearbox oil in but it didnt help the 1st gear from standing start.
facade, give it a go, try plonking the gear into 4th gear or 3rd, then shift to 1st. It should shift in easier if your got a bit of pressure plate binding.
This was std practice in old series land rovers esp the ones with a crash box (no synchro in 1st). Good ol days.....not really, the jimny is like a limo compared to the series LRs I drove.
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Owl wrote:
facade, give it a go, try plonking the gear into 4th gear or 3rd, then shift to 1st. It should shift in easier if your got a bit of pressure plate binding.
This was std practice in old series land rovers esp the ones with a crash box (no synchro in 1st). Good ol days.....not really, the jimny is like a limo compared to the series LRs I drove.
I traded it in for a gen 4 auto, I had it 10 years and I rebuilt the gearbox (to cure a noisy input bearing) and changed the clutch, it was always the same. I did try magic gearbox oil, super expensive fully synthetic, and I don't think it made any difference apart from an initial placebo effect.
I had a IIA with no syncho on 1st & 2nd, a III with the all synchro 'box, and a 200TDi 110 - that was awkward to get in 1st too.
I can't see it being the clutch sticking, as I'd expect it to go in easier- with a mighty crunch if there was a slight stickiness, or just try to grind all the teeth off if the synchro couldn't stop the front half of the gearbox and the clutch.
I just assumed it was mechanical misalignment, and down to the dog teeth not being crowned enough.
If it suddenly breaks, go back to the last thing that you did before it broke and start looking there
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- Owl
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The diagnostic: I've seen this before on my other van, that both reverse gear and 1st have troubles engaging, with reverse, it has an over stated crunching to engage. little crunch I understand is fine and normal. The 2nd professional opinion is taking that line.
1st gear will get impossible to slot in as the engine ./ gearbox warms up to operating temp. Its identical to the clutch problem i have seen before. I took it to the 'go to' gearbox tech' and he diagnosed the shift probs as the clutch. He did say that the pressure plate has a different release characteristic when they get warmed up which magnifies this fault .
I have to go with that for the moment, but after reading these posts I accept it may not be the fix but i need to try this out. ill keep you posted.
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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
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- Owl
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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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If it suddenly breaks, go back to the last thing that you did before it broke and start looking there
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- Owl
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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.
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- Owl
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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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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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