The driveline behind the clutch
The same split that reaches a clutch reaches the parts behind it, and that is where the deeper driveline work lives: IH torque amplifiers that free-wheel in low side, transmission input shafts that whine and grind, PTO clutch packs that slip under a loaded baler. TA rebuilds add $900 to $1,900 during a split on the published guide, PTO packs run $900 to $2,600 and input work $1,800 to $4,800, all done in your shed with the free phone diagnosis sorting which repair your symptoms actually point at.
The TA, honestly
Dane County still runs a great deal of IH iron, so the torque amplifier question comes up weekly. The honest framing: a tired TA does not strand the tractor, it just quietly steals the low range until the machine is a single-speed version of itself, and owners adapt without deciding to. The economical repair moment is whenever the tractor is split for any other reason, because the TA rebuild then rides on labor already paid for. Waiting for the TA alone to justify a split means paying full split labor for it, and that math is exactly why we flag TA condition on every IH clutch job while the flagging is free.
PTO and gearbox work
PTO problems earn careful diagnosis because their repairs range so widely. A worn engagement linkage is an hour; a slipping independent PTO clutch pack is a real job at $900 to $2,600; and the design of your model decides whether the pack services from outside the housing or needs a split. Transmission complaints follow the same logic, from input bearings that repair on the farm to deep gear work that honestly belongs on a bench. The phone diagnosis with a model number sorts every one of these before a quote exists, which is how we avoid selling splits that symptoms never asked for.
Driveline questions, answered
What exactly is a torque amplifier and why does mine slip?
The TA is the on-the-go two-speed unit IH built into decades of its tractors, a planetary and clutch pack living just behind the engine clutch. Its wear pattern is famous: low side free-wheels or slips under load while direct drive keeps working. It slips because its clutch pack and sprag wear out, and the fix is a rebuild kit installed with the tractor split.
Is a TA rebuild worth it on a fifty-year-old tractor?
If the tractor earns its keep, usually yes. The rebuild adds $900 to $1,900 to a clutch split and restores the low side you have probably lived without for years. On a machine that only ever needed one range, locking it out is the honest cheap alternative, and we will say which answer fits your use.
My PTO will not engage under load. Split job or top job?
It depends on the design. Some PTO clutch packs service from the rear or top of the housing without splitting; others live at the front of the transmission and need the halves apart. The model number tells us which yours is, and the free phone diagnosis prevents quoting a split you might not need.
The transmission grinds going into one gear. Can that be fixed on the farm?
Often, and honestly sometimes not. Input shaft bearings, worn couplers and shift linkage all repair well in a farm shed. Deep gearbox work on some models becomes a bench job beyond what field conditions allow, and when yours is that case we say so at diagnosis instead of after the split.
When the symptom turns out to be the clutch itself, the clutch page covers that whole job, and Madison Tractor Split prices both from the same table.
Tell us what it is doing
Model plus symptom settles most driveline questions on the first call, free.