Triumph TR4A-250 Chassis Assembly, Repair Sections and Attachments

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Part No.: GRID200678

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£43.00 ex VAT£51.60 inc UK VAT
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£13.75 ex VAT£16.50 inc UK VAT
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Out of stock, expected soon Jul 31, 2020. Add to cart and Back Order
£33.50 ex VAT£40.20 inc UK VAT
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£19.25 ex VAT£23.10 inc UK VAT
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£18.00 ex VAT£21.60 inc UK VAT
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£18.00 ex VAT£21.60 inc UK VAT
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Out of stock, expected soon Jul 31, 2020. Add to cart and Back Order
£32.00 ex VAT£38.40 inc UK VAT
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Out of stock, expected soon Jul 31, 2020. Add to cart and Back Order
£32.00 ex VAT£38.40 inc UK VAT
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Out of stock, expected soon Jul 31, 2020. Add to cart and Back Order
£30.50 ex VAT£36.60 inc UK VAT
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Out of stock, expected soon Jul 31, 2020. Add to cart and Back Order
£32.50 ex VAT£39.00 inc UK VAT
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14
Does not include body mounting brackets which must be retained from the original unit or fabricated.
£165.00 ex VAT£198.00 inc UK VAT
Quantity
15
Car set includes reinforcements and stud pins

Note:- Does not include reinforcement plates which can be purchased separately (see part no. 140009KSK)
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£59.00 ex VAT£70.80 inc UK VAT
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£32.00 ex VAT£38.40 inc UK VAT
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£10.75 ex VAT£12.90 inc UK VAT
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18
Includes damper mountings, brackets and pins.
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£139.00 ex VAT£166.80 inc UK VAT
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£38.00 ex VAT£45.60 inc UK VAT
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£27.25 ex VAT£32.70 inc UK VAT
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£10.75 ex VAT£12.90 inc UK VAT
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21A
Includes cross tube and brackets.
Length of box sections approx. 20".
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£98.00 ex VAT£117.60 inc UK VAT
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£0.37 ex VAT£0.44 inc UK VAT
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£81.00 ex VAT£97.20 inc UK VAT
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£0.37 ex VAT£0.44 inc UK VAT
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£0.31 ex VAT£0.37 inc UK VAT
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£24.25 ex VAT£29.10 inc UK VAT
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Allows gearbox with later J type overdrive to be fitted to an A type overdrive chassis.
Includes mounting rubber and hardware.

Replacement mountings are available as part number 130985
£129.00 ex VAT£154.80 inc UK VAT
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£0.55 ex VAT£0.66 inc UK VAT
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£2.15 ex VAT£2.58 inc UK VAT
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£0.12 ex VAT£0.14 inc UK VAT
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£0.31 ex VAT£0.37 inc UK VAT
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36
The lower front inner wishbone brackets which are welded to the chassis, are considered weak points of the front suspension as they are often found to be cracked or even broken away from the chassis.
This is usually caused by running into pot holes or hitting kerbs. These brackets are easily replaced by a competent chassis  repair workshop, and represent a considerable improvement.
It’s a good idea to periodically check these brackets, and have them replaced or reinforced if they are cracked or broken, as this condition presents a severe safety hazard.
We have followed a design from Triumph themselves and produced a strengthening kit which comprises three plates that are welded to the inner wishbone bracket and the chassis. See photo.
£33.00 ex VAT£39.60 inc UK VAT
Quantity
37
The lower front inner wishbone brackets which are welded to the chassis, are considered weak points of the front suspension as they are often found to be cracked or even broken away from the chassis.
This is usually caused by running into pot holes or hitting kerbs. These brackets are easily replaced by a competent chassis  repair workshop, and represent a considerable improvement.
It’s a good idea to periodically check these brackets, and have them replaced or reinforced if they are cracked or broken, as this condition presents a severe safety hazard.
We have followed a design from Triumph themselves and produced a strengthening kit which comprises three plates that are welded to the inner wishbone bracket and the chassis. See photo.
£33.00 ex VAT£39.60 inc UK VAT
Quantity
38
For added strengthening.
Fits to inner side of lower wishbone mounting turret.
£6.70 ex VAT£8.04 inc UK VAT
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Usually in stock at our supplier, allow 1 week for delivery
£95.00 ex VAT£114.00 inc UK VAT
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Out of stock, expected soon. Add to cart and Back Order
£3.65 ex VAT£4.38 inc UK VAT
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£0.31 ex VAT£0.37 inc UK VAT
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£7.70 ex VAT£9.24 inc UK VAT
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Customer Comments
"Good choice and excellent delivery." Customer Comment
Product Description

Triumph TR4A-250 Chassis Assembly, Repair Sections and Attachments
CHASSIS ROT & FATIGUE

The IRS chassis was a compromise which enabled Triumph to go independent without spending too much. Regrettably this left a few development needs for customers to discover. Designs exist for beefing up lower fulcrum brackets and differential mountings which were not made public as a massive recall would have been financially devastating for the cash strapped company in the mid 1970s.
Originally, these chassis were given only a coat of chassis black enamel. Modern paint or galvanising procedures would have controlled corrosion but fatigue problems were inevitable, so should be faced at the first opportunity. The differential mountings can be tackled from underneath although a popular route in the past was through the rear floor area, which may explain some unusual welding visible when the carpet is lifted. The pins could be re-welded and hopefully reinforced as well but the only proper solution is with the body off the chassis and to replace the pins and associated fixings completely with heavier gauge, reinforced units, which fully box the pins. The trailing arm chassis legs collect water and fatigue too, so should never be repaired: replacement is essential. This requires removal of the upper and lower cruciform (or breast) plates to permit full seam welding.
The corrosion at the rear end of the chassis can be rampant, hence the need for ill. No. 21 (RR1324). Fatigue to the differential bridges also quite frequently necessitates complete replacement. At least the replacement bridges carry all the necessary strengthening modifications. The side braces, ill. No. 6, collect water and rot. After replacement, don’t forget to drill water outlet holes at their bases. Cars can suffer from fatigue to the gearbox mounting brackets and should be replaced as required. A little extra reinforcement here does not go amiss.  Don’t for get that the 3/8" washers under the four fixing bolts should be hardened, not mild steel which soon wear and allow gearbox movement.
The front suspension chassis brackets, ill. No. 3 fatigue and are easily damaged in accidents or even kerbing. These must be carefully inspected and replaced if showing any untoward signs. Either way, fitment of the reinforcement plate (Ill no. 36 or 37) is recommended and adhere to the 25-ft/lbs. torque clamping the lower fulcrum brackets to the chassis. Finally remember, your chassis is very old and may have had an unhappy previous life. Accident stress might not make itself known for thousands of miles and may be hidden by paint or underseal.

Strengthening Lower Wishbone Arm Brackets

The lower front inner wishbone brackets (illus. no.3) which are welded to the chassis, are considered weak points of the front suspension as they are often found to be cracked or even broken away from the chassis. This is usually caused by running into pot holes or hitting kerbs. These brackets are easily replaced by a competent chassis  repair workshop, and represent a considerable improvement to the earlier TR2, TR3, TR3A and TR4 design.  It’s a good idea to periodically check these brackets, and have them replaced or reinforced if they are cracked or broken, as this condition presents a severe safety hazard.
We have followed a design from Triumph themselves and produced a strengthening kit which comprises three plates that are welded to the inner wishbone bracket and the chassis.

Review: Barry Submitted: 27/01/2020

Overall5 out of 5 stars.


Subject

Looks just as I had Expected. Good Quality item
Overall

Did this item work well with your project? What vehicle type are you using this for?

I haven't installed these yet but they appear to be a very good fit with only a little trimming on one end.