Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   Pelican Parts Forums > Porsche Forums > 911 / 930 Turbo & Super Charging Forum

LinkBack Thread Tools Rate Thread
Thread Post New Thread    Reply
Registered User
Join Date: Jul 2010
Location: New Jersey
Posts: 4,584
Transmission syncro question

ok, i am about to pull the engine and trans next month. My third gear just started grinding, and first is getting difficult to get into sometimes...trans is dry as a bone and not leaking anywhere.

i want to have a full rebuild done locally before anything gets worse.

i know i will need a new third syncro ring and hub.

am i correct is saying the "syncro ring" is the part that wears out?

i want to have all the syncros replaced, just want to make sure i order the correct parts.
Old 09-26-2011, 11:37 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered User
DSPTurtle's Avatar
Join Date: Jul 2001
Location: Suntree, Florida, USA
Posts: 2,231
The terms you are looking for are: dog teeth, brake bands and stop blocks. Those are the parts that you end up replacing when you rebuild the trans. They are all really expensive by the way. But, at least you only need 4 not 5
JB - BreitWerks
Engine Rebuild & Restorations
Old 09-26-2011, 01:38 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
Join Date: Jul 2006
Location: S. Florida
Posts: 7,267
You never downshift into 4th so there's usually no reason to replace the 4th gear synchro parts - they don't wear out.

anchor blocks, stop blocks, energizer rings, brake bands, and synchro rings should be inspected by someone that knows the gearbox because some of those expensive little parts last a very long time and maybe ok to reuse.

The 1-3 synchro rings will be replaced. If it doesn't pop out of gear the slider and selector teeth may be ok to reuse but someone experienced with the gearbox should inspect and decide.

Most rebuilders will replace the special nuts that go on the ends of the shafts because they have a collar on one end that gets bent over into a key way on the shaft so they don't come loose. Reusing and rebending those is not a reliable rebuild.

Anyway, a BMW 2002 4 speed and the 930 4 speed gearbox are two of the easiest to rebuild... no intermediate plate with 2 piece roller bearings in a simple 4 speed.
Old 09-26-2011, 02:00 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)

Thread Tools
Rate This Thread
Rate This Thread:


All times are GMT -8. The time now is 09:06 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.