Synchronizer blocker rings three slots
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Tuned
Joined: Aug 2011
Posts: 261
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Synchronizer blocker rings three slots
Can someone tell me what the difference between the narrow and wide slots in the blocker rings of the 50s three speed transmission and when and why were they changed. I have one each of the synchronizer assy and not sure which one to install or if it even matters. I’m thinking there must have been a reason B/W changed them but cannot find any info on it. Sure would be nice to pick one of the B/W engineers brains to answer questions about why things were done back in the day.
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Tuned
Joined: Aug 2011
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Understand, however you have the same transmission in many vehicles with same parts yet different synchros assy. And the question remains which blocker rings to install or does it matter. Looking at my synchronizers they look identical except one has narrow and the other has a wider blocker ring.
Fleet Owner
Joined: Jul 2004
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From: NM
The synchro hub, sleeve and blocker rings all need to have the same width of slots, and use the matching width inserts.
While the trannies over a wide range of years may use the same case and appear to be identical, there are internal differences in gear ratios and other parts. There were changes in '51-up light duty 3-sp's that mainly affect 1st/reverse but also other parts, and they can't be interchanged with earlier units.
While the trannies over a wide range of years may use the same case and appear to be identical, there are internal differences in gear ratios and other parts. There were changes in '51-up light duty 3-sp's that mainly affect 1st/reverse but also other parts, and they can't be interchanged with earlier units.
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