Unauthorized Gear Change?

dkrace67

New Member
Messages
18
Likes
0
Location
MN
#21
Hi all, and thank you very much for your input. The problem is getting noticably worse. If I hold my hand on the shifter while I let the clutch out (keeping positive pressure on it to hold it in first), it will make the loud BANG noise like it jumped out of gear BUT it is still in gear because I was holding it in there. Weird huh? The only way to get it to NOT pop out of gear or make the loud bang is to cycle it in and out of first several times. If you are waiting at a light (or whatever) with it in neutral and the clutch out, then quickly just put it in gear and let the clutch out, it will pop out almost every time. I think I may have to bite the bullet and just bring it into the dealer. I am going to try and adjust the clutch first and change the gear lube, but after that I'm afraid I'm out of options. No good...
 
Messages
4,917
Likes
18
Location
Reading,PA
#23
If the shifter linkage is out of adjustment or bent this can happen.

It could also be worn dog teeth for 4th gear (not good).

"When you make a 0.001" change at the shift knob and maintain pressure (like resting your hand on the shift knob while driving), the required 0.004"-0.006" gap is closed, preventing the lubricant to ride between the gear and shifter rail. This gap allows for the transmission lubricant to acts as a barrier so that the shifter rail and gear are not directly touching, causing premature wearing of the gear (not syncros), shifter rail, or both."

I have a problem with this. The pressure that the drive train (under load) applies to the gear and rail is MUCH greater than a few oz. of hand pressure. How can the hand pressure create more wear than normal transmission running forces?
 
Messages
1,869
Likes
0
Location
Mo town
#24
frolf said:
but keeping pressure on the knob while its in gear is bad.
funny how when i was driving an auto, i'd rest my hand on the shifter, pretending i was driving a stick.

now that i actually have a manual, it's ironic, i hardly ever rest my hand on the knob. esp once i get to 4th or 5th gear. it just makes logical sense. shifter movement has direct affect on the gears, moving it around in one direction or another while two different parts are perfectly fit and moving together would only results in wear and tare!
 
Messages
880
Likes
0
Location
Pittsburgh, PA
#25
Average Jae said:
funny how when i was driving an auto, i'd rest my hand on the shifter, pretending i was driving a stick.

now that i actually have a manual, it's ironic, i hardly ever rest my hand on the knob. esp once i get to 4th or 5th gear. it just makes logical sense. shifter movement has direct affect on the gears, moving it around in one direction or another while two different parts are perfectly fit and moving together would only results in wear and tare!
no really it wouldn't

grc said:
ever see a punk in a mustang wangin the shifter back and forth at a light? they do wear out, and pretty fast too. all trans' are slightly different, but they are also very similar. some have nylon covering the shift forks, some are just metal. they all wear. check out the feel of different shifters and you will find some that have been in "mustang mode"- loose as a $2 hooker.
No, thats linkage play
 
Messages
4,412
Likes
5
Location
Wayzata, MN
#26
frolf said:
ahha, i found it. the ZF S5D 250G gear box can be known to pop out of 1st/2nd under load due to a faulty guide sleeve on first and second gear.

the guideshaft can be replaced, but you have to disassemble the gearbox.

if you bring it in, most dealers will want to replace them flat out.
 

grc

Member
Messages
258
Likes
0
Location
chicago burbs
#27
yes, it will loosen up the linkage a bit also. these ZF boxes aren't cheap, drive in mustang mode all you want. my trans builder just reminded me again yesterday that he will not work on my trans. put a clutch in, no problem, but no trans work. they are a major PITA and shops charge accordingly. mines way out of warranty and i'm going to be very nice to it!
 

dkrace67

New Member
Messages
18
Likes
0
Location
MN
#29
I'm still having the problem. I have just been religous about cycling it in and out of gear before taking off. Have you got yours back from the dealer yet? What was the outcome?
 

dkrace67

New Member
Messages
18
Likes
0
Location
MN
#31
I kind of doubt that a short shift kit will do anything, unless the problem is indeed a linkage problem. Did the shop have any insight when you brought it to them or didn't they look at that problem?
 
Messages
62
Likes
0
Location
Calgary, Canada
#32
dkrace67 said:
I kind of doubt that a short shift kit will do anything, unless the problem is indeed a linkage problem. Did the shop have any insight when you brought it to them or didn't they look at that problem?
going into the shop next week, hopefully it won't break the bank. i'll keep you guys posted too.
 
Messages
1,247
Likes
0
Location
NY
#33
Hmm, what is up with BMW and their trannys on the e36? The manual has a faulty guide and the auto just dies from 80k to 120k miles.
 
Messages
1,247
Likes
0
Location
NY
#35
My tranny is going pretty strong and it has been a lot of miles on her already, make me think if they changed it already.
 

dkrace67

New Member
Messages
18
Likes
0
Location
MN
#36
Well, I finally broke down and brought my car into the dealer...and, pretty much as I expected, they say "tranny is shot, replace it" They are also telling me that rebuilds are pretty much out of the question because of part availability. Does anyone have any ideas on the subject? The shop floor supervisor (i.e. - Head Wrench) said that the dog ears are bad, the levers that hold it into first. Well, I want to try and rebuild it myself (I'm not scared) but does anyone know of places to get parts, maybe even know of a place where I can get it rebuilt or buy another one? There were several other things wrong as well, so I have to buy some parts. Is there an Online (or otherwise) store where I can get parts (less expensive than the stealership?). Any and all help is appreciated.

DK
 
Messages
4,917
Likes
18
Location
Reading,PA
#37
Justin (jrt67ss350) has posted before that these trannies are not easy to work on. From what I have been told and read, they use a lot of pressed in assemblies and special tools that make repairs difficult. That would be required to replace the dogs.

Frolf mentioned above that the guideshaft can be the problem, that might be a bit easier to repair.

The Shop Floor Supervisor said "the dog ears are bad, the levers that hold it into first." From what I have seen, dog ears are more like studs or teeth, not levers. I'm not sure what he was getting at (levers), maybe just different words for the same thing?

There are some cases where this problem was a worn shifter fork. It pops out of gear because the shifter fork is worn and does not push the dog teeth into a fully engaged position. I think this would be the easiest of all the repairs as you don't have to work on any rotating parts.
 

grc

Member
Messages
258
Likes
0
Location
chicago burbs
#38
my trans builder won't even work on my Z3 trans. he says a clutch, no problem, but i'm not working on the trans! he says they're a bitch. mine was swapped under warranty for popping out of first gear, no problems since. i think your "head wrench" is just talking crap about the "dogears"? there is a well known part that fails, something to to do with a slider on a rail. lots of posts about it, shoulda been a recall. i think there is an upgraded replacement part.
 


Top