Abs??

[bimmer630]

I've noticed that some people have problems when running the E36 hubs with their E30 ABS systems due to the tooth count difference between front and rear (this is when retaining the E30 trailing arms and sensors), but on some other boards people are saying that the tooth count doesnt matter as long as its the same on each axle, front to rear doesnt matter.
what have you guys run into when trying to make your ABS work after a 5 lug conversion?

[clavinZERO]

I have not gotten mine to work yet... still trying to figure out if it is the wiring or the tooth count myself.

[bimmer630]

I have not gotten mine to work yet... still trying to figure out if it is the wiring or the tooth count myself.

yeah i read about somebody else having trouble with ABS and somebody chimed im and said the tooth count front to rear shouldnt matter, which if you think about it makes sense sorta.. it would just be like running smaller diameter wheels/tires on the front axle and large ones on the rear, right? your ABS would still work with the bearings turning at different road speeds front to rear wouldn't it? so having different tooth count should just equate to the same thing. I dunno just an idea.

[Aptyp]

From what I understand there are different amount of geared teeth on the front. Rear axle has gear on it, so if you're reusing e30 axles, you're good to go. Front is tricky, I really hope to find an easy solution to this.

Was hoping to find that solution today, but decided to dick around on r3v instead.

[clavinZERO]

yeah i read about somebody else having trouble with ABS and somebody chimed im and said the tooth count front to rear shouldnt matter, which if you think about it makes sense sorta.. it would just be like running smaller diameter wheels/tires on the front axle and large ones on the rear, right? your ABS would still work with the bearings turning at different road speeds front to rear wouldn't it? so having different tooth count should just equate to the same thing. I dunno just an idea.

I was thinking that is why you WOULD want to keep rolling diameters within a certain tolerance... so that the ABS unit would not freak out. But then again, what about in hard turns and during peelouts and braking... then that would throw my arguement out the window since obviously the fronts and rears would be at different speeds too (making tooth count irrelevant like you say). Hmm... now I really wanna get a scope or something so I can check the signals coming from the sensors.

[Aptyp]

tire diameter doesn't effect ABS speed sensors.

[bimmer630]

tire diameter doesn't effect ABS speed sensors.

so the actual wheel speed isnt whats playing games with the ABS system, its the actual tooth count?
then.. basically the E36 hubs and sensors arent talking nice with the old E30 computer?? or do people who are running Z3 rear axles and E36 front hubs have no problems with this scenario because both axles are the same tooth count?

[Aptyp]

just looked at both e36 and e30 front hubs with bearings, and ABS gear ring seems to have same number of teeth. What remains to be seen, if there's a way to plug e30 sensor in. I'll find out very shortly.

[bimmer630]

my E36 front spindles seem to have smaller holes in them compared to the older, Metal casing-style wheel speed sensors that the E30 uses (dont look like they will fit)

[BenM]

just looked at both e36 and e30 front hubs with bearings, and ABS gear ring seems to have same number of teeth. What remains to be seen, if there's a way to plug e30 sensor in. I'll find out very shortly.

Spacers?

[clavinZERO]

So now that we have made it to the part where we agree tooth count is not a factor... let's wait for his electrical and sensor placement findings.

[Aptyp]

I wonder if e30 sensor could fit in e36 spindles... Maybe with some spacer or bore. I wish it's really simple, lol.


My rear ABS is plugged in perfectly, so I won't be having problem with that...


What I want to know is this, how come I can't find wheels that I want from e36/e46... It's ridiculous that wheels I chose for the project didn't fit, and now I can't source a cheap set of e36/e46 wheels...

[BenM]

Try these 2 threads.

http://www.r3vlimited.com/board/showthread.php?t=53415&highlight=ABS

http://www.r3vlimited.com/board/showthread.php?t=115744&highlight=ABS

Looks like the way to do it is E30 rear sensors shimmed out 6-8mm and spliced E36 front sensors. I'd rather do regular E30 sensors in the front, with the hole enlarged and the sensor spaced for proper fitment. Plus, I don't like rewiring ABS stuff.

[Aptyp]

That's my exact feeling, stock ABS works great, that's why I'll be attempting to keep stock ABS sensors. My whole point of using e30 trailing arms is to keep e30 ABS sensors without spacing or any sort...

[bimmer630]

I wonder if e30 sensor could fit in e36 spindles... Maybe with some spacer or bore. I wish it's really simple, lol.


My rear ABS is plugged in perfectly, so I won't be having problem with that...


What I want to know is this, how come I can't find wheels that I want from e36/e46... It's ridiculous that wheels I chose for the project didn't fit, and now I can't source a cheap set of e36/e46 wheels...

what rims did you try that didnt fit?? I am thinking of using '95 M3 wheels (the ones with "motorsport" written on them) and im wondering if they will fit or not.

also with the ABS issue, the hold down screw for the sensor is the same size, right.. so technically one could drill out the bore to accept the E30 sensor as long as the teeth on the hubs look the same