Yea!
You may have lucked out – big time. If the transmission on the bench is a 901/13 and un-modified to fit a ’71, then you have an easy direct replacement for the trans in your ’69 911, regardless of Type. Even if it had been modified from ’69 to ’71, it should be easy to return it to original.
Major progress is made here.
The communication issue can be improved by writing in complete sentences and re-reading your post. I write everything in MS Word.doc format with the spell check and grammar check. I then copy/paste to Pelican. I think my misunderstanding you was from cryptic posting. Lame o’l me isn’t very internet lingo savvy. King’s English (Brit or American) works well for me.
OK, now to play time.
Count the teeth on the gear pairs. They are represented as {(input shaft teeth)
: (pinion shaft teeth)}. Each gear should be marked. Check
here, report what you find.
“…noisy and rumbly….” usually indicates a failing intermediate plate 4-point bearing. This is not uncommon with 901 & 911 transmissions. Those two bearings should be replaces every time the transmission is serviced. Yes, they are expensive but they were failing within warranty when close to new.
The shifting issues are not unusual and can be fixed with new syncros, engagement dogs, sliding sleeves and related parts. This is regular long-term maintenance for 901, 911 and 915 transmissions – similar to brakes and clutches. These are friction wear parts. It also sounds like you need some simple shift linkage bushings for a start.
Do you have the differential out? Does it have the “Simplified Differential” up-date?
Dave, Tyson and the TRE crew can repair this for you also. They certainly have the skill and inclination to do it right. Many others are there to help also.
If you DIY; Pelican Parts, TRE and others can help supply parts. This Forum can provide information and guidance.
Now it is your turn to report. HeHe.
Best,
Grady