66 replies to this topic

[myss427]

The best and strongest box is now the T-56 magnum, shifter hole in the exact position, mechanical speedo drive, 700 ft pounds torque rating and only $2795.00 from Jeggs plus shipping.

Edited by myss427, 26 August 2009 - 02:38 PM.

[wot179]

I turned a toploader and a nine inch into landfill in one go at the drags in a light car with a dirty old 307 in it.(see avatar)

Stay away from Ford crap.Stick with GM parts.

[yel327]

Yep, my mate's HK GTS did the same thing to 2 x toploaders with a hot 307, and a few 9" LSD's as well. A mini-spool fixed the 9". Funny thing is the Muncie came out after near to 10 years of service as he was worried about breaking good GM bits, so the toploaders are sacrificial anyway. Lets call them an automotive shear pin! The Muncie is still going around in a tonner.

[LXdamo]

Bit of an old thread,but
I can say that the standard muncie's are fairly strong.Only broke it by doing stupid stuff.(broke the outer race of the input bearing and only had half the amount of balls left)
Super T10 sounds like the goods for sure.

[debkar]

Doug Nash 5 speed, 5th is 1:1,

http://personal.atl....clindh/4+1b.jpg

[Litre8]

From experience I would not recommend a DNE (now made by Richmond Gear) 'street' 5 speed for high torque applications (unless its been significantly re-engineered since the earlier versions).

[debkar]

From experience I would not recommend a DNE (now made by Richmond Gear) 'street' 5 speed for high torque applications (unless its been significantly re-engineered since the earlier versions).

Only experience was some years ago behind quite healthy BB Chev in HQ one tonner, broke traction before broke drivetrain, ratios were nice.

Tremec TKO is rated higher torque wise I believe.

695 torque is quite impressive though

Regards Simon

Edited by debkar, 17 September 2009 - 09:06 PM.

[Litre8]

in the DNE, third gear was/is located mid way on main shaft with only support bearings at either end of the box. Under reasonable torque, the main shaft would flex as the 3rd gears tried to push themselves apart, resulting in the drive gear removing 4 or 5 teeth from the driven gear.

[debkar]

Ah I see,still is in Richmond Gear even in pro shifted 5 speed

http://northwestvets.com/5speed.jpg

[Litre8]

Luckily the gears are replaceable so I got mine "professionally" fixed (another story of horror) and sold off, replaced it with the 5 speed Jerico.

[yel327]

I still reckon any box that could handle what Bob Jane's ZL-1 threw at it must be tough as nails. Yes Bob used steel end plates, but that is basically what these guys do with their new boxes. I reckon for value you can't go past one of these new M22's with 26 spline input and 32 spline (TH400) output shaft:

http://www.tbtrans.c...cie_4_speed.htm

If it's for a weekend streeter with big torque (like a BBC in a HQ) a wide ratio (2.52:1 1st) one of these with a 3:1 diff would give you all you need, forget a 5 speed. As for a box for something small like a 308 or 350 I think you'd find these things unbreakable, just use standard 9" diff centres as sacrificial lambs!

[debkar]

Luckily the gears are replaceable so I got mine "professionally" fixed (another story of horror) and sold off, replaced it with the 5 speed Jerico.

That looks to be a strong unit, low weight to from memory, straight cut gears?

[Litre8]

DNE 'street' version used low helical gears, not straight cut.

Inside the Jerico 5 speed...

[debkar]

I still reckon any box that could handle what Bob Jane's ZL-1 threw at it must be tough as nails. Yes Bob used steel end plates, but that is basically what these guys do with their new boxes. I reckon for value you can't go past one of these new M22's with 26 spline input and 32 spline (TH400) output shaft:

http://www.tbtrans.com/muncie_4_speed.htm

If it's for a weekend streeter with big torque (like a BBC in a HQ) a wide ratio (2.52:1 1st) one of these with a 3:1 diff would give you all you need, forget a 5 speed. As for a box for something small like a 308 or 350 I think you'd find these things unbreakable, just use standard 9" diff centres as sacrificial lambs!

They seem good prices, even in USD with freight,

DNE 'street' version used low helical gears, not straight cut.

Inside the Jerico 5 speed...

That does look a serious 'box, very nice

[Litre8]

I think Bob also used a Weismann box in either the Monaro or the Monza.

[yel327]

Even $1575 US for an M21 is good. That'd cost you about $1775 at exchange rate of about 0.83, $AUS200 freight plus GST. Makes it just under $2,200 landed. Rest of the stuff like shifter, bellhousing, clutch etc will cost the same for whatever box you use. These boxes will bolt to a 253/308 using a HT/HG Saginaw bellhousing which pull less than $200 on Ebay. Or an original Chev bellhousing which seem to pull about $50 if not from a Monaro. And use an original Holden tailshaft and yoke (unless you get the 32 spline version), and fit on a TH350 crossmember.