3.73 installation Problems
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Teching In
Joined: Oct 2002
Posts: 43
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From: Indiana
3.73 installation Problems I have a 98 Z28 and I have a pretty good shop installing my 3.73 gears and they ran into a problem late last night, so they had to keep my car over night so i'm trying to get all the info I can. The gear will not fit it is too tight. Not enough backspacing in there. Is there anything that we should look at or any problems that usually occur when installing 3.73's.
Joined: Nov 2001
Posts: 8,484
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From: Cecil County Raceway!!!
Re: 3.73 installation Problems what gears did you have? if they were too tight sounds like you bought thick cut gears (for a 2-series carrier) and tried putting them on a 3-series carrier
If it was the other way around (common mistake) then they would be way too loose
If it was the other way around (common mistake) then they would be way too loose
Joined: Nov 2001
Posts: 3,043
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From: Texas and Qatar
Re: 3.73 installation Problems If they are the right gears, maybe they just don't know how to change the side shims to adjust for more backlash?!
FYI: Decrease the left shim thickness and add the same amount to the right shim. Usually the thickness will be like this:
Left shim: .243" Right shim: .237"
Now if its too tight you would want to loosen it by taking away the total thickness on the left shim, sometimes I just swap them left to right and vice versa and thats enough.
Set backlash in the .007-.010" range favoring the low side of that range - depending on gear pattern. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
FYI: Decrease the left shim thickness and add the same amount to the right shim. Usually the thickness will be like this:
Left shim: .243" Right shim: .237"
Now if its too tight you would want to loosen it by taking away the total thickness on the left shim, sometimes I just swap them left to right and vice versa and thats enough.
Set backlash in the .007-.010" range favoring the low side of that range - depending on gear pattern. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
