Identifying: "Jap" or borg Warner box & Wide Vs. Narrow

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Identifying: "Jap" or borg Warner box & Wide Vs. Narrow

Postby 81GL » Sun Jan 17, 2010 8:21 pm

For the benefit of some of the newer guys (& girls??), and possibly some of the older ones too lol,

Here's a couple of pictures to help you tell the difference between a "Jap" box & a Borg Warner.

Borg Warner

Image
Photo of a Borgy 5spd Wide bell housing standing on end.
-Note how the body of the gear box is divided up into several castings & the Bell housing is detachable from the main housing.
-Oil plug is on the 'drivers side' (... I live in Australia)

Image
Also on the Borgy's, the shifter is held in place by a single threaded assembly.

From in the vehicle, the Borg Warner is easy to pick as reverse is top Left on the H.


"Jap" box

Image
Photo of a Jap 5spd Wide bell housing.
-Note the body & bell housing is a one piece design, not very well shown by picture, but the base of the gear box is flat & unbolts to gain access to the internals.
-Oil plug is on the passenger side.

Image
On the Jap box the shifter is held in by bolts. On this particular gear box the shifter is situated up and back from the housing, placing it above the output spline; As far as I am aware, this is a trait of the later model vehicles becoming slightly larger - happy to be corrected if I'm wrong.

From in the vehicle, the "Jap" box is easy to tell as reverse is on the bottom Right of the H.

Difference between Wide & Narrow bell housing

Image
Picture of a Narrow bell housing. Measuring the two outside locating dowels/bolt holes (AKA: where the vernier is) measures 319mm

Image
Picture of the Narrow bell housing with the Wide spacer placed on top. Note the difference on the two outside holes?
-Will measure the center to center of them soon.

Hope that is of use for some.
& if anyone has any additions or alterations, please PM me.

Cheers,
Nick.

PS: Do note that I have NOT included every single difference between the two box's. Such things like splines, speedo cables etc are different!

edit: hiccup fixed, thanks GB_BB4C (and no one will ever know :o :lol: )
Last edited by 81GL on Thu Jan 21, 2010 8:47 pm, edited 1 time in total.
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Re: Identifying: "Jap" or borg Warner box & Wide Vs. Narrow

Postby 75wagon » Sun Jan 17, 2010 8:33 pm

Thanks for that info Nick. :thumpsup:

I'm sure a lot of members will find that useful. Good to see the difference between wide and narrow block and where to measure to.

For info to go with this on what RWD engine options are wide and narrow blocks look at this link below.
Woops has done a really good job putting this one together, plenty of good info here.

Bolt in RWD Engine Upgrades
http://www.sigma-galant.com/viewtopic.php?f=30&t=2206

Dave...
If you want any sigma-galant.com stickers, then look here for how to get them sigma-galant.com stickers
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Re: Identifying: "Jap" or borg Warner box & Wide Vs. Narrow

Postby locostbryan » Tue Feb 23, 2010 10:59 am

What is the model code stamped on the Borg Warner box?

Just wondering if it is related to the 1980's 5-speed fitted by Ford & Holden. Ford had 0507-xxx stamped on the left rear of the extension housing, and I've seen mention of 0505 for the Sigma, but haven't been able to find anything "official".

Cheers,
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Re: Identifying: "Jap" or borg Warner box & Wide Vs. Narrow

Postby amgis_obrut » Fri Mar 12, 2010 9:37 pm

yes the BW 5 speed used in sigmas is the 507 similar to that found behind 200ci XF falcons, 3.3 VK commodores and Nissan Bluebirds, the 505 is a BW 4 speed
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Re: Identifying: "Jap" or borg Warner box & Wide Vs. Narro

Postby rx22nv » Tue Nov 28, 2017 12:41 pm

Bumping this thread up. Does anyone know if the box is the same between the wide and narrow borg warners?

For example, If I have a borg warner box can the bellhousings can be interchanged between wide and narrow?
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Re: Identifying: "Jap" or borg Warner box & Wide Vs. Narro

Postby Scorpma82 » Tue Dec 05, 2017 9:17 am

On the borgwarner yes

I did it many years ago going from 2L -2.6L
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Re: Identifying: "Jap" or borg Warner box & Wide Vs. Narro

Postby rx22nv » Tue Dec 05, 2017 11:23 am

Awesome, thanks for that!
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