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Find a new mechanic Posted by Cmyles [Email]  (#1126) [Profile/Gallery]
(more from Cmyles) on Fri, 24 Dec 2010 09:58:02
In Reply to: My mechanic told me to let the clutch out a little to, KB88900T, Thu, 23 Dec 2010 17:56:32 Members do not see ads below this line. - Help Keep This Site Online - Signup |
KB88900T,
Your mechanic does not understand how a clutch and transmission are supposed to work. Here's why: There are three gears involved with selecting reverse.
1)The mainshaft reverse gear always spins when the car is rolling and does not spin if the car is stopped, as it should be when you are selecting reverse.
2)The reverse idler gear is always engaged with the cluster gear so if the cluster is spinning the idler is spinning. It is only engaged with the mainshaft reverse gear when in reverse.
3)The cluster gear spins whenever the clutch is engaged (and the engine is running).
Disengaging the clutch allows the cluster gear to stop spinning so that the reverse idler can be slid to mesh with the reverse mainshaft gear. There is a spring on the shift selector shaft which acts as a brake to help stop any "coasting" of the cluster gear specifically so that reverse can be engaged. So if your cluster gear won't stop spinning when you disengage the clutch (to shift into reverse) then the clutch is not fully releasing.
Reverse is not synchromesh so you should only try to engage it once the car has fully stopped moving. Sometimes when you try to shift into reverse the gears will be aligned so as to prevent engagement, tooth to tooth instead of tooth to gap, BUT THIS SHOULD NOT CAUSE ANY GRINDING because if the clutch is working properly no gears will be spinning. When that happens the solution is to align the reverse gears by, while continuing to keep the clutch disengaged, either shifting into another gear, like first or second, which rolls the cluster and idler gears a tiny bit, and then into reverse OR (if you are stopped on an incline) allowing the car to roll a few inches (while keeping the clutch disengaged), which will roll the mainshaft reverse gear a bit, allowing you to select reverse.
Your clutch is failing to disengage and when you grind reverse you are destroying the two most (virtually) unavailable parts in your entire gearbox. Find a mechanic that can make your clutch perform properly before your reverse gears are destroyed. It very likely requires only greasing the clutch shaft (as others have noted) and/or proper bleeding of the hydraulics. Good luck
posted by 198.233....
, Fri, 24 Dec 2010 09:58:02 <-- Viewing This Message, Thu, 23 Dec 2010 07:52:28
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