Jump to content
  • When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Transmission Tunnel Concerns


Recommended Posts

Finally got a chance to jack up my car and look underneath. I think I found that my guibo is missing a bolt:

post-46384-0-52195800-1406053734_thumb.j

 

Is the gap between the floor and the shift plate/linkage normal? Looks like the previous owner pop riveted a smaller plate over the top of the transmission tunnel...but why?

post-46384-0-06261600-1406053931_thumb.j

 

Is this the correct mounting plate for my 4 speed?

post-46384-0-55258700-1406054046_thumb.j

 

Is this cutout supposed to be here?

post-46384-0-66778200-1406054098_thumb.j

post-46384-0-80654900-1406054125_thumb.j

 

What is this arm for? And why is there a loose circle clamp around it?

post-46384-0-59159700-1406054181_thumb.j

Link to comment
Share on other sites

1) Yes you are missing a Guibo bolt

2) No idea why pop riveted plate

3) Not the stock mounting plate for the 4 speed

4) Cutout is not stock. My 4 speed certainly doesn't have it.

5) Last picture is the clutch slave cylinder and the throw out fork. Clip should be all the way to the left holding the rubber booty to the metal tube.

Edited by Stevenc22

1976 BMW 2002 Chamonix. My first love.

1972 BMW 2002tii Polaris. My new side piece.

Link to comment
Share on other sites

I believe the car originally was an automatic because of the opening for the shifter.  My guess is they cut the bottom of the bellhousing to make it easier to install because they did not know what they were doing.   

1970 1602 (purchased 12/1974)

1974 2002 Turbo

1988 M5

1986 Euro 325iC

Link to comment
Share on other sites

I believe the car originally was an automatic because of the opening for the shifter.  My guess is they cut the bottom of the bellhousing to make it easier to install because they did not know what they were doing.   

 

The automatic tunnel has the same opening as the four speed as you can see in the picture of my converted to stick '74. 

post-41415-0-98212200-1406059273_thumb.j

 

There has definitely been some modifications to your car. It has a custom made mounting bracket and the support arm is bent. Is your car a 4 speed or is it the close ratio dog leg 5 speed? If it is the latter, the transmission is a little over three inches longer than the 4 speed. Maybe some one put in the CR transmission at one point and did not shorten the shift linkage three inches and had to cut the tunnel. Then they went back later and tried to make it right with the shorter linkage and had to fix the tunnel. The CR has the same slave set up as the 4 speed.

Link to comment
Share on other sites

@peterschop That sounds very likely. This car was likely the previous owner's parts car. The previous owner mentioned that he thought it had a 5 speed at some point (but did not mention if he was the one who removed it).

My next questions are:

What should the tranny mount look like? Where can I buy one?

What is the shift linkage supposed to look like? I'm guessing it's supposed to be more sturdy and possibly why the shaft is so floppy.

Is there no lubricant in the clutch/flywheel? I am worried that it's dry and rusty in there due to the hole.

Link to comment
Share on other sites

Your original trans mounts have likely been cut off the tunnel.  What you have

might actually be the best solution.

 

It's supposed to mount to a rubber 'buffer' that mounts to the body.

 

No, it's pretty normal for the flywheel to rust a bit.  It's actually OK.

 

t

"I learn best through painful, expensive experience, so I feel like I've gotten my money's worth." MattL

Link to comment
Share on other sites

yes, what you have would work for a tranny mount.  if you must have original, get tranny mount brackets from massivebrakes.com and put a WTB add in the parts section for the mount itself.

 

 

do not lube the flywheel...keep oil away from the clutch plate.

 

i would get that hole in the bottom of trans fixed at some point though.

2xM3

Link to comment
Share on other sites

If your car is an occasional driver, I wouldn't worry too much about the cutout, any water will drain out. I wouldn't forge any creeks though. If you can cover the hole, all the better. It will keep any road grime off the clutch and flywheel. As had been said, the home made tranny bracket will work as is and I would leave it the way it is. I would be more concerned about the oil leak covering every thing with rust preventing fluid. You probably need a new transmission output shaft and selector shaft seal. Once that is done, finish it off with a 320i transmission rubber mount.

Link to comment
Share on other sites

Your shifter platform is sagging and almost touching the driveshaft. The horizontal part of the platform should be pushed up next to the tunnel and a foam "donut" helps seal the shift platform to the round opening. I see your vertical shifter support is bent. I would remove it, inspect the bottom rubber bushing and bend the arm straight then reinstall. All you need are two 13mm wrenches for removal and adjustment.

While you are messing around, the shifter bushings, tranny seals and guibo can be inspected and replaced. This stuff is the very first thing I did to my car after purchasing it.

Jim Gerock

 

Riviera 69 2002 built 5/30/69 "Oscar"

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • BMW Neue Klasse - a birth of a Sports Sedan

    BMW Neue Klasse - a birth of a Sports Sedan

    Unveiling of the Neue Klasse Unveiled in 1961, BMW 1500 sedan was a revolutionary concept at the outset of the '60s. No tail fins or chrome fountains. Instead, what you got was understated and elegant, in a modern sense, exciting to drive as nearly any sports car, and yet still comfortable for four.   The elegant little sedan was an instant sensation. In the 1500, BMW not only found the long-term solution to its dire business straits but, more importantly, created an entirely new
    History of the BMW 2002 and the 02 Series

    History of the BMW 2002 and the 02 Series

    In 1966, BMW was practically unknown in the US unless you were a touring motorcycle enthusiast or had seen an Isetta given away on a quiz show.  BMW’s sales in the US that year were just 1253 cars.  Then BMW 1600-2 came to America’s shores, tripling US sales to 4564 the following year, boosted by favorable articles in the Buff Books. Car and Driver called it “the best $2500 sedan anywhere.”  Road & Track’s road test was equally enthusiastic.  Then, BMW took a cue from American manufacturers,
    The BMW 2002 Production Run

    The BMW 2002 Production Run

    BMW 02 series are like the original Volkswagen Beetles in one way (besides both being German classic cars)—throughout their long production, they all essentially look alike—at least to the uninitiated:  small, boxy, rear-wheel drive, two-door sedan.  Aficionados know better.   Not only were there three other body styles—none, unfortunately, exported to the US—but there were some significant visual and mechanical changes over their eleven-year production run.   I’ve extracted t
  • Upcoming Events

  • Supporting Vendors

×
×
  • Create New...