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Shifting of gears is nearly impossible

Model 92706

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Hi there I have a 1976 Chevy C20 pickup and I was wondering could low or to much fluid in the transmission make it hard or impossible to shift while its running it is a munci 4speed sm465

the level of oil in a manual transmission has little bearing in the shift operation of the transmission as all it does is lubricate the working parts
excessive oil will overload the input shaft seal and may cause oil getting to the clutch plate or leaking out of the drive shaft seal
However the quality of oil used will have a bearing on the shifting of the gears
If the oil is too heavy ( viscosity above 80 oep) it affects the ability of the synchro mechanisms to work especially in fast shifting requirements
if it is too low ( 30 or less) it affects the wear or the gears and bearings and again will not have the shear strength to allow the synchros to engage properly with out causing excessive wear
From your question and problem description, I suspect that the problem is not in the transmission or oil level but in the clutch operation
If the clutch plate is not properly disengaging, the engine revolutions will not allow the synchros of the gears to operate properly and make shifting near impossible
so check the oil used and the level and fill to the level specified by the manufacturer
check and adjust the clutch for correct operation as there may be a problem in the slave cylinder/ master cylinder / cable operation that is not allowing complete disengagement of the cluch

Sep 01, 2016 | Cars & Trucks

1 Answer

What might be the problem,after i shift the gear in DRIVE and the vihicle start running at normal speed,the speedometer goes off and the gear shift to low gear

Impossible to make an accurate diagnosis without knowing the YEAR, MAKE, and MODEL of your vehicle. Generally, however, the problem you are describing sounds like a problem with the SPEED SENSOR.

Sep 06, 2014 | Cars & Trucks

1 Answer

I put a shift kit & torque converter & now it

impossible to answer with no model/year info for you car/truck

Sep 02, 2014 | Cars & Trucks

1 Answer

1997 Ford Expedition, 4.6L: The shift lever is difficult to pull out of Park and when shifting gears like from Reverse to another gear there is alot of slack. I have noticed that shifting to 1st is near...

There are bushings on the rods for the shift linkage. They are plastic and get brittle and fall apart. Block the wheels and get under it and have someone move the shifter and see where it is binding up or what bushings are missing. Make sure emergency brake is on also.

May 13, 2017 | 1997 Ford Expedition

1 Answer

The gear shifter on the Girls' Diamondback Tess 24 is too tight for my daughter to shift gears. She can shift down toward the higher numbers, but getting back up to 3-2-1 is nearly impossible for her....


these can be adjusted, but the first thing to do is to change the entire gear cable.
spraying the whole thing with wd40 or simillar may help, but the lining of the outer cable has almost certainly worn and is causing the problem you are having.

this is very common. bike makers tend to use relatively cheap cables, and they can wear and cause problems quite easily.
oil the new cable before you fit it and you should not have any more problems.

hope this helps

Jul 07, 2011 | Diamondback Tess 24 Mountain Bike Girls' ...

1 Answer

The gears are very hard to shift

you need to put dope in trans and check gear shifter to see if it is loode if not check your drive belt

Apr 23, 2010 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

After the transmission warms up shifting out of first gear is nearly impossible. It feels like I've shifted into gear but the bike acts like it is in neutral. This is a major problem I've changed the...

Adjust the clutch again , and make sure you have sport trans ( HD ) in the primary. Also make sure your primary chain is adjusted correctly. as the bike gets hotter, the chain tightens up putting alot of pressure on the clutch pack as well as the stator ( your charging system )

I’m happy to assist further over the phone at

Jun 25, 2009 | 2000 Harley Davidson XL 1200 C Sportster...

2 Answers

1st gear hard to find

You have a shift fork with just a slight bend in it. The problem will only get worse. Sorry about that.

Pleas rate this solution. Thanks!

Mar 30, 2009 | 2004 BMW R 1150 RT (ABS)

2 Answers

Lighting problem while shifting

Guru is wrong, on this model the instrument cluster must be removed and sent for refurb. I have not found anywhere to buy parts to fix it. The dealer wants $400 to $500 CAD to fix, so far the cheapest I have found is a place in Manitoba that repairs for $170 with a 2 year warranty. Trying to find a used one is near impossible in Canada, only found 2 and they wanted $175 for it. I'll probably go for the $170 refurb as it has a warranty

Oct 16, 2008 | 2002 Buick Century

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