IndigoJo:
ellies dad:
but perhaps it’s just a heap of junk.Sent from my iPhone using Tapatalk
Correct.
Carryfast:
Bking:
Carryfast:
Which leaves the inconvenient question of why only 2 years warranty on a factory exchange Allison trans v 3 years on a Fuller.In addition to the power losses of a torque converter v clutch.
ZF offer a 10 year warranty and what power losses.
Can’t argue with a 10 year warranty
.
As for torque converter power loss.
Can come up with anything in a laboratory,look at Volkswagen.
Love to find any dry clutch “automatic” of whatever horsepower keep up with a bog standard 250 horse ■■■■■■■ in a mercury tug with a Alison epicyclic 4 speed auto transmission up to 50 kph.The torque converter more than compensates for any transmission “losses” and if you fit the full 8 speed Alison it will leave any mechanical box for dead and last at least 3 times as long before an overhaul.Also a lot less loading on the engine as it is always in the correct ratio for load/demand.Just needs regular servicing and will out last the engine.Seen Alison and Voith gearboxes last ten years in dock tugs that have just had regular oil and filter changes and not a sign of a slow shift.And these boxes are constantly under load in both forward and reverse.Superb machines.
A firm I worked at had an ex Watney’s Seddon Atki 400 with a 290 ■■■■■■■ and a 6spd Allison auto, it was an absolute flying machine, nothing could touch it away from the lights, it had zero engine braking and drunk diesel like it was going out of fashion, but it flew and did fantastic rolling burn outs when bobtail!
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Bking:
Carryfast:
Bking:
Carryfast:
Which leaves the inconvenient question of why only 2 years warranty on a factory exchange Allison trans v 3 years on a Fuller.In addition to the power losses of a torque converter v clutch.
ZF offer a 10 year warranty and what power losses.
Can’t argue with a 10 year warranty
As for torque converter power loss.
Can come up with anything in a laboratory,look at Volkswagen.
Love to find any dry clutch “automatic” of whatever horsepower keep up with a bog standard 250 horse ■■■■■■■ in a mercury tug with a Alison epicyclic 4 speed auto transmission up to 50 kph.The torque converter more than compensates for any transmission “losses” and if you fit the full 8 speed Alison it will leave any mechanical box for dead and last at least 3 times as long before an overhaul.Also a lot less loading on the engine as it is always in the correct ratio for load/demand.Just needs regular servicing and will out last the engine.Seen Alison and Voith gearboxes last ten years in dock tugs that have just had regular oil and filter changes and not a sign of a slow shift.And these boxes are constantly under load in both forward and reverse.Superb machines.
Try driving an elderly Dennis Dart or Volvo Olympian and you might like to reconsider the bit about slow changes. Although having said that it is the uncontrollable fast downchange just before coming to a halt which propels the passengers towards the exit all in a heap! A really bad Dart will have you struggling to find a throttle position which doesn’t have the thing changing up and down, with the accompanying clunks and jerks every few seconds on a hill.
Most of the problems on bus transmissions are caused by the stupid retarder/intarder systems that are bolted onto the gearbox/diff to save on brake wear.
cav551:
Bking:
Carryfast:
Bking:
ZF offer a 10 year warranty and what power losses.Can’t argue with a 10 year warranty
As for torque converter power loss.
Can come up with anything in a laboratory,look at Volkswagen.
Love to find any dry clutch “automatic” of whatever horsepower keep up with a bog standard 250 horse ■■■■■■■ in a mercury tug with a Alison epicyclic 4 speed auto transmission up to 50 kph.The torque converter more than compensates for any transmission “losses” and if you fit the full 8 speed Alison it will leave any mechanical box for dead and last at least 3 times as long before an overhaul.Also a lot less loading on the engine as it is always in the correct ratio for load/demand.Just needs regular servicing and will out last the engine.Seen Alison and Voith gearboxes last ten years in dock tugs that have just had regular oil and filter changes and not a sign of a slow shift.And these boxes are constantly under load in both forward and reverse.Superb machines.Try driving an elderly Dennis Dart or Volvo Olympian and you might like to reconsider the bit about slow changes. Although having said that it is the uncontrollable fast downchange just before coming to a halt which propels the passengers towards the exit all in a heap! A really bad Dart will have you struggling to find a throttle position which doesn’t have the thing changing up and down, with the accompanying clunks and jerks every few seconds on a hill.
Figured this video would probably help.
The last drag race has an impressive results.
philgor:
Figured this video would probably help.
The last drag race has an impressive results.
Don’t get me wrong the advantage of torque converter auto is the ability to maintain power on the upshifts.It all gets a bit more complicated when in gear acceleration is taken into account.On that note I started out mostly with this type of thing.But a manual fuller driven right all else being equal takes some beating at the end of the day. 
I did a week in a Daf XF with 1,400,000 Kms on the clock. It was very hard to reverse, the clutch engaged rather suddenly. I had to reverse slightly up hill onto a loading door with no buffers in dark tunnel, it was very difficult to judge, if you didn’t want to slam into it too hard. Apart from that it was a lovely old motor.
Carryfast:
a manual fuller driven right all else being equal takes some beating at the end of the day.
Amen to that. Light, precise, positive. Always reminded me of a 70’s/80’s Ford car change (sans syncro of course).
Next best would be a sixteen speed Volvo.
Kerragy:
Carryfast:
a manual fuller driven right all else being equal takes some beating at the end of the day.Amen to that. Light, precise, positive. Always reminded me of a 70’s/80’s Ford car change (sans syncro of course).
The manual bus v auto fire truck video example is a brilliant demonstration of ultimate performance of Fuller v Allison in the real world bearing in mind the 8v71 N powered bus probably has a bit/lot less torque/power to weight ratio than the 6v92T fire truck. 
I think the traditional automatic transmission will be a very rare thing in the future. These new twin clutch gearboxes will see to that, the wife has a Focus with a 6spd twin clutch box and it is so smooth and makes seamless changes even if you drive it like a hooligan.
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My Actros has a way better box than my MAN did
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My current has a way better box than my ex did.
the maoster:
My current has a way better box than my ex did.
Hmmm, sounds like something dipper would say!
Evil8Beezle:
the maoster:
My current has a way better box than my ex did.Hmmm, sounds like something dipper would say!
It’s a creeping illness that Dipper has injected here. We are all posting double entendres. All that’s missing is the “fnaar, fnaar” at the end of each post.