What do need for a Posi rearend?..Trac Loc
Printed From: The Ford Torino Page
Category: Model Specific Forum
Forum Name: General Automotive Technical Discussion
Forum Description: Technical Automotive discussion of anything not specific to mid-size Ford/Merc
URL: https://forum.grantorinosport.org/forum_posts.asp?TID=14932
Printed Date: 23-September-2023 at 4:36PM
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Topic: What do need for a Posi rearend?..Trac Loc
Posted By: GoldFinger
Subject: What do need for a Posi rearend?..Trac Loc
Date Posted: 06-April-2016 at 1:44PM
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Well,the topic pretty much sums it up.My car came with a non posi highway gear. While it is cool to keep up with everyone on the highway,I would prefer to step up with about a 3:73 gear. So with my rear tire and wheel size it will probably be run like a 3:55 gear.So besides a ring and pinion what else will I need to get? ------------- DARE to be DIFFERENT!! 73 GTS |
Replies:
Posted By: californiajohnny
Date Posted: 06-April-2016 at 1:53PM
basically a good used 3rd member with the trac'lock and the gearing you want, pull the axles and swap the 3rd members  put the axles back in fill with 90w and don't forget to add a tube or 2 of the friction modifier!
------------- JOHN 74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
Posted By: GoldFinger
Date Posted: 06-April-2016 at 2:48PM
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Thanks! How many splines? Don't know much about what to buy or look for. ------------- DARE to be DIFFERENT!! 73 GTS |
Posted By: GoldFinger
Date Posted: 06-April-2016 at 2:53PM
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Can't I just by all the internal items since I have a 9 inch from the factory? I have someone to do it for me once I get everything. ------------- DARE to be DIFFERENT!! 73 GTS |
Posted By: californiajohnny
Date Posted: 06-April-2016 at 5:17PM
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yes that's what i did! probably the best way to go (with new carrier and bearings and seals) then you know it's good! also a good time to replace the axle bearings while it's apart you probably have a 28 spline in there now, you could pull an axle and count the splines before you buy! it should be either 28 or 31 splines. the place i got mine from doesn't have any at this time. but this is the closest i found new: http://www.ebay.com/itm/9-Ford-28-Spline-Posi-Unit-Trac-Lok-9-Inch-NEW/221873451647?_trksid=p2047675.c100040.m2060&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D35934%26meid%3D9e04a2052be44a74b01ec1f82ef38f09%26pid%3D100040%26rk%3D1%26rkt%3D4%26sd%3D221873451647" rel="nofollow - http://www.ebay.com/itm/9-Ford-28-Spline-Posi-Unit-Trac-Lok-9-Inch-NEW/221873451647?_trksid=p2047675.c100040.m2060&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D35934%26meid%3D9e04a2052be44a74b01ec1f82ef38f09%26pid%3D100040%26rk%3D1%26rkt%3D4%26sd%3D221873451647 ------------- JOHN 74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
Posted By: GoldFinger
Date Posted: 06-April-2016 at 11:00PM
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Thanks,if it is 28 is it ok to go to a 31 spline? ------------- DARE to be DIFFERENT!! 73 GTS |
Posted By: californiajohnny
Date Posted: 07-April-2016 at 2:01AM
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yeah you'll need to buy some 31 spine axles ------------- JOHN 74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
Posted By: mcford
Date Posted: 07-April-2016 at 7:19AM
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ITLL BE 28 SPLINE. ------------- Mike |