Texx
Super Moderator
Original Article Credit: nzEP85, Fatman
I put my EP85 on the dyno today (rolling road), made a massive 45kw atw, but sadly only the front wheels were spinning. Had a look underneath and, as I was expecting, the viscous coupling had leaked fluid and was not transferring drive to the rear axle.
Speaking to the toyota parts man, everything for the ep95 is still available but nothing for the 85. Everything is different between the 85 and 95, but we thought it could maybe be made to work, and the 95 bits are about £120 cheaper anyway. So it was decided to get one ordered up from Japan and give it a go.
To help certain other members who are/may have this problem with there EP85/95's, I decided to take pictures and do the write up of the install.
First things first, car was jacked up so the wheels could spin freely.
Managed to get a decent look at the old shaft, note the huge amount of fluid sprayed on the underside.
So took it out and laid it next to the new EP95 one.
A few things that were slightly different became apparent.
Firstly the mount points for the exhaust hanger thing are on opposite sides, not a huge deal as the factory exhaust is fine without it.
Old
New
Secondly the lengths are also slightly different, also not a problem as the mounts have room for the bolts to slide.
The major difference however is the flange on the transfer case side. The holes were out a few mm's
So after thinking about it for a while, we decided to see if we could swap the flanges around.
If you look carefully at the photo two back, you'll notice the special 'deformed' nut. In order to get this off you need to either, stick a small flat screwdriver down the hole (hard), or grind some of the top corner where the hole is to make it bigger (what we did)
Then its just the simple step of putting the old flange on, which bolts straight on.
And putting it back in the car.
So in summary there appears to be 2 ways of doing this. You will have to get the EP95 shaft (37120-16030 £387 +vat 02/2010) as the EP85 shaft is discontinued.
1. Do it the way we have
2. Get the flange re-drilled by an engineering shop so you dont have to swap flanges
Big thanks to Fatman for helping with the install and pretty much figuring out how to make it work.
I put my EP85 on the dyno today (rolling road), made a massive 45kw atw, but sadly only the front wheels were spinning. Had a look underneath and, as I was expecting, the viscous coupling had leaked fluid and was not transferring drive to the rear axle.
Speaking to the toyota parts man, everything for the ep95 is still available but nothing for the 85. Everything is different between the 85 and 95, but we thought it could maybe be made to work, and the 95 bits are about £120 cheaper anyway. So it was decided to get one ordered up from Japan and give it a go.
To help certain other members who are/may have this problem with there EP85/95's, I decided to take pictures and do the write up of the install.
First things first, car was jacked up so the wheels could spin freely.
Managed to get a decent look at the old shaft, note the huge amount of fluid sprayed on the underside.
So took it out and laid it next to the new EP95 one.
A few things that were slightly different became apparent.
Firstly the mount points for the exhaust hanger thing are on opposite sides, not a huge deal as the factory exhaust is fine without it.
Old
New
Secondly the lengths are also slightly different, also not a problem as the mounts have room for the bolts to slide.
The major difference however is the flange on the transfer case side. The holes were out a few mm's
So after thinking about it for a while, we decided to see if we could swap the flanges around.
If you look carefully at the photo two back, you'll notice the special 'deformed' nut. In order to get this off you need to either, stick a small flat screwdriver down the hole (hard), or grind some of the top corner where the hole is to make it bigger (what we did)
Then its just the simple step of putting the old flange on, which bolts straight on.
And putting it back in the car.
So in summary there appears to be 2 ways of doing this. You will have to get the EP95 shaft (37120-16030 £387 +vat 02/2010) as the EP85 shaft is discontinued.
1. Do it the way we have
2. Get the flange re-drilled by an engineering shop so you dont have to swap flanges
Big thanks to Fatman for helping with the install and pretty much figuring out how to make it work.