'89 l03/T5 rear gear swap. Can I just use SGI-5?
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Junior Member
Joined: May 2003
Posts: 93
Likes: 0
From: waterbury,ct
Car: 83 TA
Engine: goodwrench 350
Transmission: 700r4
'89 l03/T5 rear gear swap. Can I just use SGI-5?
Hello,
I tryed searching around on this topic and it seems people are only using the SGI-5 when going to a totally different transmission like a T-56.
I swapped 4.10 gears in to a 89 TBI car with a T5. Now when the speedo says 100 im really doing 70 (per GPS).
Can the SGI-5 be used to adjust this out and not change the signal type?
Thanks
I tryed searching around on this topic and it seems people are only using the SGI-5 when going to a totally different transmission like a T-56.
I swapped 4.10 gears in to a 89 TBI car with a T5. Now when the speedo says 100 im really doing 70 (per GPS).
Can the SGI-5 be used to adjust this out and not change the signal type?
Thanks
Joined: Jul 2000
Posts: 6,522
Likes: 92
From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: '89 l03/T5 rear gear swap. Can I just use SGI-5?
Yes on some '89 TBI cars.
No on some '89 TBI cars.
What is the car?
No on some '89 TBI cars.
What is the car?
Joined: Jul 2000
Posts: 6,522
Likes: 92
From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: '89 l03/T5 rear gear swap. Can I just use SGI-5?
Yes.
If the gear inside the trans. is purple / 7 tooth, the VSS needs a 22 tooth driven gear. That's your cheaper and easier option.
Since some of those are discontinued and that option may not exist, you could go through with the SGI-5 to reduce the VSS signal some, since the VSS feeds a VSS buffer box, which feeds the ECM and speedo.
I've been wanting to try a smaller, less expensive motorcycle-use speedo reducer / increaser instead of the SGI-5 but haven't gotten around to it.
If the gear inside the trans. is purple / 7 tooth, the VSS needs a 22 tooth driven gear. That's your cheaper and easier option.
Since some of those are discontinued and that option may not exist, you could go through with the SGI-5 to reduce the VSS signal some, since the VSS feeds a VSS buffer box, which feeds the ECM and speedo.
I've been wanting to try a smaller, less expensive motorcycle-use speedo reducer / increaser instead of the SGI-5 but haven't gotten around to it.
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