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Impractical
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236 Posts
Discussion Starter · #1 ·
In midst of a 1JZ swap into my 88T. I'm going to install a JZA70 R154 from a Turbo R and its 4.10 Torsen diff.

Will my stock 7M speedometer still read accurately if I hook everything up?

Thanks

Matt
 

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No One Ever Listens To Me
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5,467 Posts
as far as i know it should....however im assuming that from the fact that 1jz speedo cable will work on a 7m car......hopefully someone can chime in for sure...... :dunno:
 

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Impractical
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236 Posts
Discussion Starter · #6 ·
51Cards said:
It should still be accurate as the speedo cable gear on the trans is what compensates for the diff ratio. The R154 from the clip will have a gear matched to the 4.10.
Thanks Steve. That's what I thought. They had the option to change either the gearing in the speedo itself, or the drive gear in the tranny, and I imagine it would have been easier to do the tranny.

Matt
 

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Dr. Jeff Lange
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9,353 Posts
I don't know :p, but you corrected him for saying 3.78, and he may have meant 3.91... I don't recall him mentioning a year :p LOL
 
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