Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

Go to Thread: PreviousNext
Go to: Forum ListMessage ListNew TopicLog In

Mark Cooley

(15 posts)

12/10/2010 04:44PM

Main British Car:

Flock of tweety birds
Posted by: coolmgcma
Date: April 25, 2016 05:19PM

I have a 1970 MGBGT with a 3.4 GM V6, and a T5 transmission. I installed a McLeod hydraulic through out bearing, works fine but squeaks like a flock of little birds. I used a stock GM clutch and pressure plate, and I am quite sure the clearance is correct on the bearing. The only time it does not make a noise is when the clutch is depressed, otherwise it's driving me crazy. Any ideas please.

Art Gertz
Winchester, CA.
(2990 posts)

04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Flock of tweety birds
Posted by: roverman
Date: April 25, 2016 05:47PM

Sorry but earplugs, are just too easy.

Carl Floyd
Kingsport, TN
(3746 posts)

10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: Flock of tweety birds
Posted by: MGBV8
Date: April 25, 2016 08:26PM

A number of us use the McCleod HTOB. This is the first time that I have heard of that issue. Mine have been just fine for 15 years with a rare growl once in a blue moon.

Fred Key
West coast - Canada
(1259 posts)

05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

authors avatar
Re: Flock of tweety birds
Posted by: DiDueColpi
Date: April 25, 2016 10:51PM

Something is out of alignment Mark.
The center line of the pressure plate doesn't match the center line of the HTOB.
Because most HTOB's are of a constant engagement design they contact the pressure plate fingers all the time. When the center lines are off, the fingers rub and cause your noise.
You have to fix this as the HTOB will wear though the pressure plate fingers rather quickly.
I see this a lot and most of the time it's a bell housing dowel that has been missed or pushed into the block so far that it's ineffective.
If you are using an adapter of some sort that may be the problem as well.


Sorry, only registered users may post in this forum.