5 speeds

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5 speeds

Postby h-bot » Fri Jan 17, 2003 4:36 am

From: ssafstro_REMOVE_423551_THIS_@yahoo.com

I heard this past summer at a car show I was in, This elderly
gentleman talked to me about the 5 speed lock up, It happened to his
son.He said to be careful. I forgot about it until now due to the
recent postings. can I get some info on this subject for future
knowlege Thanks
steve s
cv3122




[This is message #10290 by user ssafstro on Yahoo! Group Cosworth Vegas: http://groups.yahoo.com/group/cosworthvegas ]
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5 speeds

Postby h-bot » Fri Jan 17, 2003 5:18 am

From: markrock_REMOVE_524967_THIS_@yahoo.com

Steve

Duke has written an extraordinary piece in the TCT Portfolio on this
issue and on the T-50 in general. I have compiled the Yahoo postings
on this issue in my Cosworth Vega Tips and Tricks Knowledge Base
books. The issue has also been addressed in the Cosworth Vega
magazine. An index, created by Brian Harpst, is available on the
www.cosworthvega.com website. I encourage you to read each and all.

Succinctly, first gear tends to seize to the mainshaft at high
RPM's. With predictable catastrophic results.

CVOA Member/Director/Machinist Roy Linenberger will modify your
transmission by installing a bronze bushing in first gear with the
proper/needed clearances, and make other mods as needed, for a
reasonable fee. He is doing one for me now. It is cheap insurance.

Alterntively, you can install a 77-up T-50. These transmissions were
extensively redesigned, as Duke's article explains.

Cheaper insurance, but not as comprehensive, is to remove the trans
fluid and replace it with Redline MTL till it starts running out of
the fill hole. It is added protection, but not a complete solution.

Mark




[This is message #10293 by user markrock on Yahoo! Group Cosworth Vegas: http://groups.yahoo.com/group/cosworthvegas ]
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5 speeds

Postby h-bot » Fri Jan 17, 2003 5:30 am

From: doctorduke_REMOVE_132382_THIS_@yahoo.com

According to all the anecdotal evidence I have collected over the
years, first gear seizing to the mainshaft failure normally occurs
early in life - the first few hundred or few thousand miles. Mine
seized at 7000, but its replacement - the correct CV version under
warranty from GM - has lived an exemplary life.(The only difference
between the CV version and 140 version is the speedo drive and driven
gears.)

If your T-50 has over 20K miles, it will probably live. The seizing
problem is likely a production tolerance issue - too little clearance
between first gear and the mainshaft, and it only appeared to be a
problem on the CV - likely due to its much higher rev range than any
of the other engines it was used with.

Duke




[This is message #10294 by user doctorduke on Yahoo! Group Cosworth Vegas: http://groups.yahoo.com/group/cosworthvegas ]
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5 speeds

Postby h-bot » Fri Jan 17, 2003 6:47 am

From: markrock_REMOVE_269912_THIS_@yahoo.com

Britt just blew one up about a year ago. Perhaps he can tell
us how many miles were on that transmission before first gear welded
itself instantaneously to the mainshaft, as, if I recall correctly,
he was winding out second gear.

Mark




[This is message #10295 by user markrock on Yahoo! Group Cosworth Vegas: http://groups.yahoo.com/group/cosworthvegas ]
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