Reviewed by Andrew, 4WD Suspension fitment team
Tough Dog 50mm raised rear leaf springs for the Toyota LandCruiser 40/42 Series (12/1977-1984), sold per pair. Pick your eyering size (25mm or 35mm) and the rating for your constant load, then add U-bolts, greasable shackle & pins and the shackle bush kit below.
Tough Dog leaf springs are a genuinely progressive design: each leaf is set slightly proud of the one above it, so the leaves stay in contact along their whole length instead of slapping together under load.
Two-stage packs carry a lighter primary stage for everyday ride quality, with heavier second-stage leaves that only come into play as the load goes on – that's what stops the rear sagging with a canopy, tools or a camper on the back. Choose the rating by the constant load the vehicle carries, counting only permanent weight.
The matching U-bolts, greasable shackles and pins, and bush kits are available from the option dropdowns on this page – if the originals have been on since new, replace them while the pack is out rather than reusing stretched U-bolts.
Doing the whole vehicle at once? We also stock the matching front Shock Absorbers and steering Damper for the Toyota LandCruiser 40/42 Series.
Match them with Tough Dog rear shocks.
| Make | Model | Series | Years |
|---|---|---|---|
| Toyota | LandCruiser | 40, 42 Series | 12/1977 - 1984 |
Choose the load rating for the weight the vehicle carries most of the time, counting only permanent fitments such as a bar, winch, canopy or drawers. A heavier rating than you need rides firm when unloaded; a lighter one sags once the gear goes in.
| Part number | Lift | Load rating | Suits / notes |
|---|---|---|---|
| BP-010 | 25 mm | 0-300 kg | - |
| BP-010H | 25 mm | Constant 300 kg | - |
| BP-012 | 35 mm | 0-300 kg | - |
| BP-012H | 35 mm | Constant 300 kg | - |
Leaf springs are replaced as a pair with the axle supported, the U-bolts removed and the spring unbolted from the front hanger and rear shackle. Fit new U-bolts, and replace worn shackle bushes and pins at the same time. Torque U-bolts to spec and re-check them after the first few hundred kilometres. Raised springs need shock absorbers with the correct extended length for the new ride height. In most states a suspension lift of up to 50 mm is allowed without certification under VSB14; larger lifts can require engineering approval, so check the rules for your state.
Last updated: 10 September 2026
Genuine Tough Dog suspension from an authorised Australian dealer.
| Specification | Detail |
|---|---|
| Brand | Tough Dog |
| Type | Rear leaf springs |
| Position | Rear axle |
| Sold as | Pair (both sides) |
| Vehicle | Toyota LandCruiser 40/42 Series |
| Lift options | 25 mm, 35 mm |
| Load ratings | 0-300 kg, Constant 300 kg |
| Part numbers | BP-010, BP-010H, BP-012, BP-012H |
| Construction | Designed and made in Australia from micro-alloyed spring steel; shot-peened, scragged and load-tested |
| Fitting hardware | New U-bolts recommended; bush and shackle kits available as options |
Load ratings refer to permanent extra weight over the axle. Springs do not change the vehicle's GVM or towing capacity.
These suit the following applications: Toyota LandCruiser 40, 42 Series 12/1977 - 1984. Check your build date and variant against the fitment table on this page – if you're not certain, contact us with your rego or VIN details and we'll confirm fitment before you order.
The 40/42 Series ran both 25mm and 35mm spring eye bushes - measure the inner diameter of your spring eye bush (or the pin) before ordering, and pick the matching option. The fitment add-ons below match the eyering size of the spring you choose.
The listed price covers both sides – always replace left and right together so the axle is evenly damped and sprung. It's a bolt-in job for a competent home mechanic or any workshop; check bushes, mounts and brake-line slack while everything is apart.
A moderate suspension lift is generally acceptable in most Australian states, but the allowed total lift and whether certification is needed differ between states and change over time – so always confirm with your state’s transport authority before modifying. Our guide explains how the rules work state by state: are lift kits legal in Australia?
Pick the rating for the weight the vehicle carries most of the time, counting only permanent fitments. Options on this listing: 0-300 kg, Constant 300 kg. A '0-300 kg' or light rating suits a mostly unloaded vehicle; 'Constant' ratings suit a vehicle that always carries that weight, such as a canopy, drawers and a fridge.
Yes. The price covers both Tough Dog springs, one for each side.
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