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ea81 engine with ea82 5sp tranny


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17 replies to this topic

#1 soob_newb

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Posted 18 April 2013 - 09:54 PM

In the old USRM, there are two links for the swap from an ea81 4sp. tranny to an ea82 5sp.  One says to use the EA81 flywheel and pressure plate with the EA82 clutch disk, and the other says to use the ea82 flywheel, clutch, and pressure plate.    So my question is which is correct?  The first one doesn't say anything about mods, and the second requires transferring timing marks and grinding the bell housing.  Thanks for any help.


Edited by soob_newb, 18 April 2013 - 09:55 PM.


#2 The Beast I Drive

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Posted 18 April 2013 - 10:56 PM

I have found that there are 2 different thicknesses for the EA81 flywheels: one is the same as the EA82 flywheels, and works fine when using the EA82 clutch disc. The other is almost 1/4" thicker than the EA82 flywheel, and when the clutch disc is installed the pressure plate is backed up so far into the throwout bearing that it doesn't clamp the disc and slips like mad. I have run into this problem twice.

 

I always swap the EA82 flywheel, it's just not a lot of extra work and it assures you avoid the above mentioned issue. It also allows you to use XT-6 clutch parts if you want more grab.

 

-Bill



#3 Idasho

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Posted 19 April 2013 - 02:07 PM

either will work.

 

I chose to run the EA81 flywheel simply because I wanted to retain the factory timing marks.



#4 soob_newb

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Posted 21 April 2013 - 11:32 PM

Alright.  I dropped the EA82 out today, and I noticed it has six wires running from three plugs on the tranny.  The EA81 only has four wires from two different plugs.  My question is what are the other two wires with the extra plug.  I can only think of back up lights and 4WD indicator.

 

On a side note, the old USRM said to use the EA82 console and boots, but I am going to try and swap the 4WD linkage allowing me to hopefully use the EA81 console and boots.  Any info on success with that?



#5 Indrid cold

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Posted 21 April 2013 - 11:44 PM

Yes use the EA81 console, boots but the linkage has to be modified with a 5-speed transmission modified tranny support. 

 

Bratsrus1  (Jerry) makes these kits.  They work great and makes the interior looks stock... contact him.  It's not that costly and he has a quick turn around time.  

 

  That tranny mod. is great.. you will love the way it drives after. 


Edited by Indrid cold, 30 April 2013 - 11:57 PM.


#6 soob_newb

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Posted 22 April 2013 - 09:02 PM

Bump.  Anybody know what the extra wires are for?



#7 soob_newb

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Posted 23 April 2013 - 07:18 PM

Anybody? The EA82 has 3 plugs and theEA81 only has two. Do I need the third/which two should I plug in?

#8 TomRhere

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Posted 24 April 2013 - 04:25 AM

Believe I have that info on this here computer. Will look for it after work.

#9 Gloyale

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Posted 24 April 2013 - 10:42 AM

Anybody? The EA82 has 3 plugs and theEA81 only has two. Do I need the third/which two should I plug in?

 

Nuetral switch for EFI cars.  You can ignore.  this will be the switch on the trans furthest back on the drives side.  Not the one at the back, that is the 4wd.

 

The forward one on the drivers side, a bit lower, is the Reverse lights.  Green wires i believe for reverse lights.

 

IIRC, the 4wd indicator is on the linkage in EA81, in the trans on EA82.

 

So....If you wire up the 4wd lights on your trans, to the connector on the car, you will get a "LO" light in 4wd, and the "4wd" won't light til your in low range.

 

That's how mine is and it's fine as long as you know what that "lo" is 4wd, and "4wd" is low.



#10 TomRhere

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Posted 24 April 2013 - 06:15 PM

Here you go...

4spto5spplugwiring.jpg

#11 soob_newb

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Posted 24 April 2013 - 09:46 PM

Thank you guys. This helps.



#12 soob_newb

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Posted 28 April 2013 - 02:45 PM

The USRM says to retain the original tranny mounts.  The drivers side mount bolts right on but the passenger side holes don't match.  Redrill or is there something I am doing wrong?



#13 Gloyale

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Posted 28 April 2013 - 06:57 PM

Here you go...

4spto5spplugwiring.jpg

 

Again, this setup will yeild a LO light in 4wd, and a 4wd light only when in LO.



#14 soob_newb

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Posted 29 April 2013 - 07:01 PM

Who has done this swap?  What did you do with the passenger side mount? The drivers side bolted right on, but the passenger side is off by about one bolt hole width.



#15 Indrid cold

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Posted 30 April 2013 - 11:56 PM

I just did what most do... I ordered Jerry's Tranny kit.  Just bolts in.  I painted mine a bright red... marks are for my notes... just in case he goes away... I can always make one.  He's cheap, he's quick and his kits aren't that bad either! 

 

 

 

 

 

5-speed042_zps5c1b71fd.jpg?t=1367383939



#16 soob_newb

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Posted 14 June 2013 - 04:16 PM

Which axels am I supposed to use with this swap, the EA81 or EA82?



#17 Crazyeights

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Posted 15 June 2013 - 01:13 AM

With the D/R trans (23 spline) the axles should match the body style (EA81 car with an EA82 D/R trans - use EA81 axles, EA82 car with EA81 engine and D/R trans use EA82 axles). With an RX FT 4WD trans (25 spline) and an EA81 body, a custom solution is needed.



#18 el_freddo

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Posted 15 June 2013 - 09:17 AM

Here you go...

4spto5spplugwiring.jpg

 

From what I understand of the EA81's 4wd light switching system, the light to indicate you're in 4wd is located on the base of the 4wd lever, the low range is found at the gearbox.  To wire in your EA82 5spd box use the above 4wd marked wires from the low range switch on the gearbox.  To wire in the 4wd light you'll need to run two wires from the gearbox switch into the cab to the wiring at the base of the 4wd lever.

 

Once you've done this you'll have your proper 4wd light and low range light working properly ;)

Cheers

Bennie






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