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S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15.


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Old 09-20-2018, 07:54 PM   #1
FRM
 
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SR S15 sr20det 5 speed transmission?

I recently purchased an sr20det and the seller says that it is 5 speed. I thought that all s15 sr's were 6 speed? I am to receive it on Monday but is there any way to see if it is actually a 5 speed or not?
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Old 09-21-2018, 12:59 PM   #2
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all turbos are 6 speed. the none turbos are 5 speed.
you will know straight away as the 6 speed is an asin box and not the usual Nissan small case box.
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Old 09-21-2018, 03:04 PM   #3
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Thanks is this one of them? Thanks for the help so far
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Old 09-22-2018, 12:28 AM   #4
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They put 5-speeds on them to save money. Its more profitable for them to sell the 6-speed separately and use a cheap 5-speed on it.
Or maybe the 6-speed blew up...

You don't want a 6-speed usually anyways. They are more prone to failure, due to some kinda cir-clip issue that has no resolution.
Although I know quite a few 6-speed units that work fine to this day. hit or miss I suppose.

S15 motors use different computer and coilpacks, so pay attn to the ecu and coils for verify.
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Old 09-22-2018, 05:28 AM   #5
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Quote:
Originally Posted by Kingtal0n View Post
They put 5-speeds on them to save money. Its more profitable for them to sell the 6-speed separately and use a cheap 5-speed on it.
Or maybe the 6-speed blew up...

You don't want a 6-speed usually anyways. They are more prone to failure, due to some kinda cir-clip issue that has no resolution.
Although I know quite a few 6-speed units that work fine to this day. hit or miss I suppose.

S15 motors use different computer and coilpacks, so pay attn to the ecu and coils for verify.

There is a mod for the j160 4th gear cir-clip issue,
not cheap if done by these people,but easy redone DIY style
https://neatgearboxes.wordpress.com/...x-circlip-mod/
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Old 09-22-2018, 07:57 AM   #6
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cool thanks for sharing. I'm glad somebody can finally apply a fix it. Its just so obscure, expensive, I'm not sure it has an application for typical budget daily drivers just yet.
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Old 09-22-2018, 09:28 AM   #7
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a local engineer could replicate what they do to the shaft and fab some cir-clips
the j160 as in the gearbox the UK Lexus is200 1g (2.0 inline 6 NA)
came with has a stronger gearset,uses same C clip design,
and when turbo/supercharged can last many miles at over 500 bhp atw
I have a back burner project to adapt one onto a CA18det
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