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November 11th, 2006, 02:00 PM
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TH400 speedo gear change ?
How do I get to the TH400 speedo drive gear to determine the color of the speedo "drive" gear . so I can replace the "driven" gear with the correct one ? do I have to remove the trans tail piece ? or how about how I do change the speedo gears ? thanks.
TCI - TECHNICAL INFORMATION: Speedometer Gears
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87 TR - PT6776S BB Turbo , 250 cu/in Stroker , Weber Racing CNC 109 Block , Champion Ported Intake , 75 lb/hr Injectors , ME-R , 62mm TB , DLS 218/218 Roller Cam ,T&D 1.65 Roller Rockers , PAC Alky Kit , Heads Race Ported & Polished by FrankG , 4" inlet pipe , TH DP , 3" TT Cat Back Exhaust , CAS V4 , Poston Headers , Walbro 340 Pump (Hot Wired) , Fully Prepped Transbraked TH400 w/ West Coast Racing Converter . BEST TIME TO DATE : 10.97et @ 128.34 mph/1.74 60 ft on pump gas & alky. http://rides.webshots.com/album/105791401mgmznK http://www.youtube.com/watch?v=ZKochubXMl0 , http://gnttype.org/carofthemonth/arc...mdetails1.html My TR's "Day At The Track" : http://www.youtube.com/watch?v=8JwUThcEKcA Last edited by KWIKR 1 : November 11th, 2006 at 02:07 PM.     
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November 12th, 2006, 09:54 AM
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You only pull out the speedo gear adapter and change the gear on it for the driven gear. You have to pull the end off if you want to change the drive gear. You will need your tire size and gear ratio to figure out the ratio. Most speedos are based on 1000 rpm @60 mph, however there is a calulator on the web some where.
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OLD fast efi help still located at http://www3.sympatico.ca/norbz/felpro.html or email norbz@sympatico.ca 
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November 12th, 2006, 10:54 AM
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Quote:
so to ONLY change the "driven" gear I do not have to take the tail end off ? and I can see what color the driven gear is without taking the tail end off ? I was told that you had to pull the tail end off to do ANY gear change . see link below for calculator. TCI - TECHNICAL INFORMATION: Speedometer Gears
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87 TR - PT6776S BB Turbo , 250 cu/in Stroker , Weber Racing CNC 109 Block , Champion Ported Intake , 75 lb/hr Injectors , ME-R , 62mm TB , DLS 218/218 Roller Cam ,T&D 1.65 Roller Rockers , PAC Alky Kit , Heads Race Ported & Polished by FrankG , 4" inlet pipe , TH DP , 3" TT Cat Back Exhaust , CAS V4 , Poston Headers , Walbro 340 Pump (Hot Wired) , Fully Prepped Transbraked TH400 w/ West Coast Racing Converter . BEST TIME TO DATE : 10.97et @ 128.34 mph/1.74 60 ft on pump gas & alky. http://rides.webshots.com/album/105791401mgmznK http://www.youtube.com/watch?v=ZKochubXMl0 , http://gnttype.org/carofthemonth/arc...mdetails1.html My TR's "Day At The Track" : http://www.youtube.com/watch?v=8JwUThcEKcA
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November 12th, 2006, 01:18 PM
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Got it norbs ! the "driven" gear is a 35 tooth . hard to make out what the "drive" gear is . the color is fadded and you can not make the count . at least knowing the "driven" I will be able to figure out the correction if needed . I just have to find a cop with a radar gun this spring or one of those unmanned ones. that should not be to hard
 .thanks .
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87 TR - PT6776S BB Turbo , 250 cu/in Stroker , Weber Racing CNC 109 Block , Champion Ported Intake , 75 lb/hr Injectors , ME-R , 62mm TB , DLS 218/218 Roller Cam ,T&D 1.65 Roller Rockers , PAC Alky Kit , Heads Race Ported & Polished by FrankG , 4" inlet pipe , TH DP , 3" TT Cat Back Exhaust , CAS V4 , Poston Headers , Walbro 340 Pump (Hot Wired) , Fully Prepped Transbraked TH400 w/ West Coast Racing Converter . BEST TIME TO DATE : 10.97et @ 128.34 mph/1.74 60 ft on pump gas & alky. http://rides.webshots.com/album/105791401mgmznK http://www.youtube.com/watch?v=ZKochubXMl0 , http://gnttype.org/carofthemonth/arc...mdetails1.html My TR's "Day At The Track" : http://www.youtube.com/watch?v=8JwUThcEKcA Last edited by KWIKR 1 : November 12th, 2006 at 01:59 PM.
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November 13th, 2006, 02:13 PM
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a portable GPS works also to check speed accuracy.
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2006 Subaru WRX STi...yeah, it's black too. 1987 GN... Cotton's CPT61 BB P-trim, Pat's 3200 LU, K&N, hard MAF pipe, TH 3" DP with dump, 3" stainless custom exhaust with Magnaflow muffler, Walbro 340, Billet/John's adj fpr, 50# Delphis, TT chip, MSD 8.5s, HKS EVC EZ2, RJC pp, Innovative LM1, SM 2.1, various AM gauges, Eibach Pro-kit, Tokico HP struts, Full Throttle rear sway bar, Air Lift bag set, front frame brace (to be altered), poly-endlinks, AR TT2s 17x8 & 9.5's, Gbodyparts SL-IC, t-brake, TA headers via gbodyparts ....here to learn! new parts waiting on me...metco lowers, AlkyControl goodness http://www.cardomain.com/ride/2575045/1
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