Jump to content

Transmission Flange Questions

Recommended Posts

Alright so the old 4 speed in my 1600 went out, and i picked up another 4 speed, because it was a good price. I'm now converting to the hydraulic pedal bucket and system, but my question is can the 3 bolt flange on my old transmission be switched out with the 4 bolt on my newer transmission?

Link to comment
Share on other sites

As long as they both have the same number of splines you should be OK. I am not familiar with 1600 transmissions (are they different than 2002). The other thing to check would be the overall depth. On 2002 and 320i transmissions some have coarse splines and some have fine splines. Best to just pull the flanges and compare spline count.


Fred '74tii & '69

Link to comment
Share on other sites

Coarse vs fine splines on 02 trannys:  Coarse splines were used up until sometime in early 1974.  There were some '73s that had poorly heat-treated output flanges that allowed the splines to wear away (happened to my Dec 72 production '73).  The fine splines last longer than the coarse splines. 


Chances are good that your '68 1600 has coarse splines, so you're gonna have to find a three ear output flange to match the corresponding flange on your driveshaft.  Might be hard to find if your new tranny has fine splines on the output shaft. 


I don't know if the 3 bolt flange from an E21 5 speed will work or fit...you may end up having to find another drive shaft.




Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.
With your permission we and our partners may use precise geolocation data and identification through device scanning. You may click to consent to our and our partners’ processing as described above. Alternatively you may access more detailed information and change your preferences before consenting or to refuse consenting. Please note that some processing of your personal data may not require your consent, but you have a right to object to such processing. Your preferences will apply to this website only. You can change your preferences at any time by returning to this site or visit our privacy policy.