Clutch Slave Replacement on 245/5

[Slavs]

On 10/30/2020 at 3:32 PM, TobyB said:

It's not hard to swap the slave, usually-

 

loosen the exhaust at the downpipe, then put a jack under the back of the trans

and take the trans mount crossbar off.

 

That gives enough wiggle to make it pretty easy,

if you use the abovementioned long extensions and one wobbler.

Toby's approach is sound and feasible. It beats pulling the trans back. But, nothing beats the ease of replacing the slave on the stock 4 speed.

 

The 80-83 1.8L US spec 320i feels better and more natural with the 245/5 and the 3.90 diff than a 2 liter with a similar set-up. 1st gear doesn't feel like a stump puller because the 1.8L of the 320i is a short stroke motor (71mm stroke vs.the 80mm stroke of the 2.0L). It has less torque, especially at the low end. With the 2.0L 1st gear only feels natural with the 3.64 diff, otherwise it feels like a "Stump Puller" with a 3.90 diff and especially with the 4.11 diff. But, if you mate the 245/5 with a 3.64 diff and 2.0L, 5th gear probably feels a little too long and tall. There is no perfect solution. The best compromise is the 3.90 diff. This leads me to think that the 245/5 was designed with the short stroke1.8L in mind. Those motors were all over the place and the junk yards. I'm surprised there are not many of them installed in 2002s. Yes, by that time BMW had stopped forging their crankshafts, but for a stock or near stock motor the cast cranks are adequate. Or one could replicate the 1802, which also had the short 71mm stroke and mate it with a 245/5 and a 3.90 diff. The 1802 an 8 bolt forged crank, the same one used in the post-69 1600.

 

 

Edited November 1, 2020 by Slavs