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1990 trans in an 87?

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Old Jan 23, 2011 | 11:55 AM
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Default 1990 trans in an 87?

there is a 90 auto on ebay.claiming 55 k on it.aside from the torch removal procedures used it looks pretty clean.will that fit an 87?
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Old Jan 23, 2011 | 12:07 PM
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I think yes, but...

The final drive ration is higher numerically. And you'll need to swap a few pieces to get the speedo pickup from the early car into the later trans. The later car reads speed from the ABS wheel speed sensors, not a magnet and reed switch pickup on the diff cover.

The 55k is a great number but seriously no way to verify unless you can relate the trans serial number to a car vin that can be CarFaxed. Does it come with a warranty?
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Old Jan 23, 2011 | 12:19 PM
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Mr Merlin had an S4 transmission & TC for sale asking $450 last week.
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Old Jan 23, 2011 | 12:26 PM
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yes,waiting for it to be removed and checked for any signs of damage.if ok i will buy it.still looking for backup options
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Old Jan 23, 2011 | 01:08 PM
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The '90 will need some macgyvering to handle the PSD...
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Old Jan 23, 2011 | 01:23 PM
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Any installation diference when it comes to an 87 and a 89 thansmission? Are they a direct swap?
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Old Jan 23, 2011 | 01:24 PM
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See post #5.
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Old Jan 23, 2011 | 01:25 PM
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Originally Posted by WallyP
The '90 will need some macgyvering to handle the PSD...
Paging Mr. Bolt! Mr. Jack Bolt!

Unless the existing box has LSD available to swap in, and even then it's a tough decision between rebuilding the early LSD vs manually pre-loading the PSD clutch packs with the bolt and a locknut.
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