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914World.com _ 914World Garage _ 3rd to 2nd = GRIND!

Posted by: ctc911ctc Oct 8 2019, 07:21 PM

Hello Again All Teeners,

After 100 little projects I have the silver bullet (silver '74 2.0) back on the road, first time it has been registered since 1984.

Runs great, needs paint and perhaps a tranny freshening??????

I replaced all of the guide nylon bushings and re-centered the stick shift.

However, when down-shifting 3rd to 2nd is horrible, (GRIND!) better when I double shift.

First to second is ok, though at times if I am too aggressive it too will grind.

WHATS NEXT ON MY LIST????? remove the 1st and reverse section of the tranny? Complete rebuild?

Can hardly wait!

Many thanks for all of the great guidance over the years.

CTC911CTC

Posted by: rjames Oct 8 2019, 09:27 PM

Easy stuff first- Make sure clutch the cable is adjusted to disengage clutch when the pedal is 1/3rd of the way depressed.

Posted by: rhodyguy Oct 9 2019, 07:52 AM

If you just push the lever forward going from 1st to 2nd the trans should jump into the neutral plane. This is where the dentension plate and springs in the shifter assem come in to play. Then you should be able to engage 2nd cleanly. If you want to bang gears buy a Mustang.

Posted by: dr914@autoatlanta.com Oct 9 2019, 08:36 AM

QUOTE(rjames @ Oct 8 2019, 08:27 PM) *

Easy stuff first- Make sure clutch the cable is adjusted to disengage clutch when the pedal is 1/3rd of the way depressed.


I agree, first make sure that the clutch pedal is at the complete top of its travel and that you only have 1/2 inch of play before it gets hard to push, and that there is no first reverse grind at a complete stop. If all of that is good, it is the transmission, second gear in a down shift grinding is usually the first to wear out. If you cannot stand it, new sliders, syncros and dog teeth will solve it. Any shop will charge ten labor units to go through it. Labor is not bad, parts are. Special tools are needed to press off the dog teeth and check the ring gear and pinion depth

Posted by: ctc911ctc Oct 9 2019, 08:38 AM

I remember driving a new 914 in 73, the '73 tranny was very crisp and the linkage "jump" you mentioned was really apparent.

The 'jump' on the car we are working on is much less.

All of the bushings are lubed and slide easy, I have not touched the springs in the shift assembly. Might new springs help?

Thanks for the guidance!! - Mustang? Really? grin!



QUOTE(rhodyguy @ Oct 9 2019, 08:52 AM) *

If you just push the lever forward going from 1st to 2nd the trans should jump into the neutral plane. This is where the dentension plate and springs in the shifter assem come in to play. Then you should be able to engage 2nd cleanly. If you want to bang gears buy a Mustang.


Posted by: ctc911ctc Oct 9 2019, 08:43 AM

Thank you VERY much for the reply.

Not sure I am ready to attack a 901 tranny - I have the books and can buy the jigs, as to the parts, is there a standard -rebuild kit- that you would recommend rather than take it apart and order what is necessary??

THANK YOU!


QUOTE(dr914@autoatlanta.com @ Oct 9 2019, 09:36 AM) *

QUOTE(rjames @ Oct 8 2019, 08:27 PM) *

Easy stuff first- Make sure clutch the cable is adjusted to disengage clutch when the pedal is 1/3rd of the way depressed.


I agree, first make sure that the clutch pedal is at the complete top of its travel and that you only have 1/2 inch of play before it gets hard to push, and that there is no first reverse grind at a complete stop. If all of that is good, it is the transmission, second gear in a down shift grinding is usually the first to wear out. If you cannot stand it, new sliders, syncros and dog teeth will solve it. Any shop will charge ten labor units to go through it. Labor is not bad, parts are. Special tools are needed to press off the dog teeth and check the ring gear and pinion depth


Posted by: Chris914n6 Oct 9 2019, 10:01 AM

2nd is the most shifted and always the first to wear out in any car.

Parts are replaced after inspection. You will soon find that just 1 Porsche bearing is the cost of any other brands whole bearing kit....

There are ways to cheat the wallet, like swapping the infrequently used 5th gear parts to 2nd.

The DrEvil trans rebuild DVD is a great way to see what you are getting into and procedures.

Posted by: rjames Oct 9 2019, 10:07 AM

QUOTE(ctc911ctc @ Oct 9 2019, 07:43 AM) *

Thank you VERY much for the reply.

Not sure I am ready to attack a 901 tranny - I have the books and can buy the jigs, as to the parts, is there a standard -rebuild kit- that you would recommend rather than take it apart and order what is necessary??

THANK YOU!


QUOTE(dr914@autoatlanta.com @ Oct 9 2019, 09:36 AM) *

QUOTE(rjames @ Oct 8 2019, 08:27 PM) *

Easy stuff first- Make sure clutch the cable is adjusted to disengage clutch when the pedal is 1/3rd of the way depressed.


I agree, first make sure that the clutch pedal is at the complete top of its travel and that you only have 1/2 inch of play before it gets hard to push, and that there is no first reverse grind at a complete stop. If all of that is good, it is the transmission, second gear in a down shift grinding is usually the first to wear out. If you cannot stand it, new sliders, syncros and dog teeth will solve it. Any shop will charge ten labor units to go through it. Labor is not bad, parts are. Special tools are needed to press off the dog teeth and check the ring gear and pinion depth



Search up Dr. Evil on the site. He's the resident transmission expert and sells a transmission rebuild DVD that walks you through the process. There isn't a rebuild kit that I'm aware of. You'll need to take it apart and figure out what needs to be replaced by inspecting what you have.

Ensure the cable is adjusted properly first. That'll take you 10 minutes tops.

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