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Thread: 5 speed swap question
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bwaits
Hauling
Posts: 119
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posted August 08, 2005 05:47 AM |
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5 speed swap question
When swapping a 1981-1985 Rx7 5 speed into a repu will there need to be any modifications to the drive shaft?
My shaft seems to short in the front section in front. I am working blind as far as the engine location compared to stock.
-billy
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Brad
Rotorhead
Posts: 1672
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posted August 08, 2005 09:22 AM |
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quote:
When swapping a 1981-1985 Rx7 5 speed into a repu will there need to be any modifications to the drive shaft?
My shaft seems to short in the front section in front. I am working blind as far as the engine location compared to stock.
-billy
Driveshaft should be just fine. Overall length of 81-85 tranny is same as REPU.
I can say that the 79-80 bolts up better, it does need a small plate to attach tranny mount to tranny crossmember. about 4" x 4" with four holes in it.
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-brad-
74 REPU Lawn Green
81 Rx-7 racecar. 12a J-
Bridge
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bwaits
Hauling
Posts: 119
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posted August 08, 2005 10:07 AM |
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great......
I guess I need to do some more measuring and fitting. I am pretty sure I have the engine the correct spot - but the drive shaft is to short.
I will keep messing with it.
-billy
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ACT . Accufab . AEM . APEXi . AutoMeter . B&B . B&M . BBK . BORLA . Bosai . Brembo. Center Force . Earl’s . Eibach . Energy Suspension . Fluidyne . Goodridge . Greddy . HKS . INJEN . Innovate Motorsports . INTRAX . K&N . KONI . KYB . Magnacore . MOMO . MSD . NGK . NOLOGY . NOS . NX . Pace Setter . Power Slot . Prothane . ReSpeed . Rotora . Sparco . Suspension Techniques . Tanabe . Tokico . TurboNetics . Unorthodox Racing
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bwaits
Hauling
Posts: 119
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posted August 10, 2005 05:42 AM |
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If someone could grab some measurements for me that would be great.
Front of the frame to the front of the engine.
I need the length of the stock yoke on the front of the driveshaft. Say.. centerline of the u-joint to the front of the snout.
Length of the drive shaft from the pivot point in the middle to the front of the shaft.
If anyone has access to a drive shaft to measure it would help allot.
-billy
____________
ACT . Accufab . AEM . APEXi . AutoMeter . B&B . B&M . BBK . BORLA . Bosai . Brembo. Center Force . Earl’s . Eibach . Energy Suspension . Fluidyne . Goodridge . Greddy . HKS . INJEN . Innovate Motorsports . INTRAX . K&N . KONI . KYB . Magnacore . MOMO . MSD . NGK . NOLOGY . NOS . NX . Pace Setter . Power Slot . Prothane . ReSpeed . Rotora . Sparco . Suspension Techniques . Tanabe . Tokico . TurboNetics . Unorthodox Racing
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kansei
Redlining
Wankelized
Posts: 423
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posted August 24, 2005 07:38 PM |
 Edited By: kansei on 24 Aug 2005 19:39 |
Don't have the measurements for you Billy, but the 1979 & 1980 SA gearboxes are the only ones that will bolt up without major modifications other than the trans crossmember mentioned already (ask Charles- he makes them). The 1981-1985 transmissions have the shifter set further back, and will require modifying your floorboard, whereas the '79-80 trans will pop up right where the stock REPU shifter would be, to my knowledge. I know Charles did this (1979-1980 5-speed) to his truck (the red one), and I plan on doing it to my '75 when I get that far into the project.
Neal.
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klaus42
Rotorhead
Posts: 1877
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posted August 25, 2005 08:47 AM |
Edited By: klaus42 on 25 Aug 2005 08:48
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A couple'a measurements for you:
1.) Center of front U-joint bearings to tip of 'snout': 6.5"
2.) Center of middle (carrier) bearing mounting bracket (measured to very middle of the ovall-y, adjustable-mount bolt holes...) to center of front U-joint bearings:
27.5"
--Mind you, these are 'rough' tape measurements...--
...hope that helps... :)
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bwaits
Hauling
Posts: 119
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posted August 26, 2005 09:42 AM |
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Thanks.
Between Charles and your numbers I know it is the front snout that is wrong. PO must have swapped it for a pinto unit.
I will swap out the snout, machine my driveshaft to diff mount and I will be ready for the 4 link install.
-billy
____________
ACT . Accufab . AEM . APEXi . AutoMeter . B&B . B&M . BBK . BORLA . Bosai . Brembo. Center Force . Earl’s . Eibach . Energy Suspension . Fluidyne . Goodridge . Greddy . HKS . INJEN . Innovate Motorsports . INTRAX . K&N . KONI . KYB . Magnacore . MOMO . MSD . NGK . NOLOGY . NOS . NX . Pace Setter . Power Slot . Prothane . ReSpeed . Rotora . Sparco . Suspension Techniques . Tanabe . Tokico . TurboNetics . Unorthodox Racing
ReSpeed Online Catalog
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EricHappyMeal
1st Gear
Posts: 39
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posted September 25, 2005 12:33 PM |
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quote:
Don't have the measurements for you Billy, but the 1979 & 1980 SA gearboxes are the only ones that will bolt up without major modifications other than the trans crossmember mentioned already (ask Charles- he makes them). The 1981-1985 transmissions have the shifter set further back, and will require modifying your floorboard, whereas the '79-80 trans will pop up right where the stock REPU shifter would be, to my knowledge. I know Charles did this (1979-1980 5-speed) to his truck (the red one), and I plan on doing it to my '75 when I get that far into the project.
Neal.
what needs to be done with the trans crossmember with the other trannies?
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Whats up with cranberries?
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FLIBOYZ6
Revvin Up
great
Posts: 72
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posted October 13, 2005 01:04 AM |
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BEFORE CUTTING INTO THE DRIVE SHAFT I WOULD SUGGEST CHECKING THE FORD COURIER THERIR DRIVESHAFT THEY CAME IN 4 LENGTHS DEPRNDING ON THE YEAR, THE TRANS AND THE ENGINE.... ITS WHAT MY DAD HAD TO DO FOR HIS ITS GOT A TRANS FROM AN 84 RX-7
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