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I know this is an oddball question, but bear with me.
Does anybody know if the R/P gears from the truck drop-out 8" differentials also match the dimensions of the Supra/Cressida 8" IRS differential?
I know the carriers are the same, due to the supra-LSD swap.
Which makes me hopeful, the ring must at least be close. But given the different style of teh housing, I could also easily see the pinion shank, the gear size, or lash etc being different.

In short - could you fit say "truck" 4.88s into a Supra IRS?

(Paging Dr. Zuk....)

OEM 4.88's or aftermarket?

Best idea would be to call Randy's Ring and Pinion... they should know....

89 4Runner
3" BL, M/T locks, 33"bfg mt, bilstein, Kayline, tubebumper, toyotafiberglass panels
TBI: Elocker,3.4 w/ORS,b+b,S2Sstg2cams,arias pistons,P+P intake,TRDs/c,URDpullies+7th,downey headers,MAPECU2,WEGO WB, SupraMAF,walboro255,stg4clutch, EPaOo2 sim