Final drive ratio's

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
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Nismovs
Posts: 139
Joined: Sun Aug 01, 2010 4:33 pm
Car: '92 F150 Flareside 4x4 302 5spd
'11 Honda CRZ 6spd
'90 Dal-Tech Racing IMSA 300zx Turbo SM-Z
Location: Chilliwack, BC

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Does anyone know if the ring and pinion gears are swapable between na and tt housings? Want to know for selling purposes as I'll only be using na diffs/subframes


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Ace2cool
Posts: 11650
Joined: Sun Apr 20, 2008 5:21 pm
Car: 1991 Nissan 300ZX TT
1966 Datsun Fairlady 1600
2005 Suzuki GSX-R 600
1974 Honda CB550 Four
2009 Ford F150 Lariat
Location: Murfreesboro, TN

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You can get the N/A guts into the TT IIRC, but not the other way around without a bit of modification. Usually people just swap the whole rear end. Gimme a minute to dig, cause I know I saw this somewhere before.

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Ace2cool
Posts: 11650
Joined: Sun Apr 20, 2008 5:21 pm
Car: 1991 Nissan 300ZX TT
1966 Datsun Fairlady 1600
2005 Suzuki GSX-R 600
1974 Honda CB550 Four
2009 Ford F150 Lariat
Location: Murfreesboro, TN

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Ah, no, it can't be done. It's a 200mm ring gear vs a 230mm, hence the R200 and R230 designations. It just won't fit.

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NolimitZ32
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Car: 91 AG2 2+0 TTMT swap/E39 BMW 540i6/E53 4.6is Dinan S3
Location: Houston, TX

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Wait so the NA guts, will fit inside the TT case? I didn't think that was possible?!

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Ace2cool
Posts: 11650
Joined: Sun Apr 20, 2008 5:21 pm
Car: 1991 Nissan 300ZX TT
1966 Datsun Fairlady 1600
2005 Suzuki GSX-R 600
1974 Honda CB550 Four
2009 Ford F150 Lariat
Location: Murfreesboro, TN

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You'll have fitment issues I believe. I don't think the N/A will line up right.

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NolimitZ32
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Joined: Fri Jun 27, 2008 9:07 am
Car: 91 AG2 2+0 TTMT swap/E39 BMW 540i6/E53 4.6is Dinan S3
Location: Houston, TX

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That's what I though, also why I am holding on to my second NA diff :)

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Nismovs
Posts: 139
Joined: Sun Aug 01, 2010 4:33 pm
Car: '92 F150 Flareside 4x4 302 5spd
'11 Honda CRZ 6spd
'90 Dal-Tech Racing IMSA 300zx Turbo SM-Z
Location: Chilliwack, BC

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Thanks guys, Just means I can only sell to other na diff guys. All of my diffs are na so they will all be setup with slightly different ratios and I'll just leave the stock one as is, as the last resort lol


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