RER43606 vs 70127: Which Redcat Part Should You Choose?

Quick answer

Choose RER43606 if you need a direct replacement for the exact part number called out in your manual or on the failed component. Choose 70127 if your goal is a different function or fitment on the same vehicle. The deciding factor is not which part is better; it is which part your specific Redcat model and damage actually require.

RER43606 and 70127 are two different Redcat part numbers, and the fastest way to pick the right one is to match the number on your broken part or in your manual. A redcat part comparison only helps once you know which function each number serves on your vehicle.

This guide walks through how to compare RER43606 and 70127 using fit, function, and the trade-offs that matter when you are ordering rc replacement parts. It also shows how to read other Redcat part numbers, like RER25594 and RER26715, so you can apply the same logic to any redcat racing parts order.

How to compare RER43606 and 70127 before you buy

Start with the part number printed on the component you are replacing or listed in your model's exploded view. RER43606 and 70127 are not interchangeable just because they fit similar vehicles; each number maps to a specific function, position, and mounting pattern. If the number on your old part matches one of these, that is almost always your answer.

If you cannot read the old part number, compare the mounting points, screw hole spacing, and overall shape against the product photos. A redcat vehicle comparison of the two numbers only works when you compare the same function. If one number is a mount and the other is a drive component, they are not alternatives; they are different repairs.

• Write down your exact model name and the part number from the manual before comparing anything.
• Photograph the failed part next to a ruler so you can check dimensions against the listing.
• If the part number is worn off, contact Redcat support with your model and a photo.

What the trade-off actually looks like

The trade-off between RER43606 and 70127 is not performance versus price. It is correct fit versus wasted time. Ordering the wrong number costs you a return, shipping time, and another teardown. Ordering the right number the first time keeps your build on schedule, even if the part costs a few dollars more.

This is why rc car part differences matter more than brand loyalty at the part level. A cheap part that does not fit is more expensive than the correct part. Use the catalog facts and your manual together, and treat any missing specification as a reason to verify rather than guess.

• Check the catalog price and comparison price, but do not let a discount override fitment.
• If a listing does not state a dimension you need, ask before ordering.
• Keep the old part until the new one is installed and tested.

Reading other Redcat part numbers the same way

The same logic applies across the catalog. RER25594 is a Rear Motor (1pc), so it is a drivetrain replacement, not a chassis mount. RER26715 is a Center Drive Shaft Set (1Set), which is a multi-piece assembly rather than a single fastener. Knowing the function first prevents mismatched orders.

Small hardware is where mistakes are most common. RER13666 is a set of 2.3x6mm Countersunk Phillips Self Tapping Screws (12pcs), and RER17999 is a Battery Tray (2pcs). Neither is a substitute for a structural mount. Match the function, then match the number.

• Group your order by function: drivetrain, chassis, hardware, electronics.
• Buy hardware in sets like RER13666 so you have spares for the next repair.
• For rebuilds, 07406 CVA Rebuilt Kit (1set) covers wear items in one purchase.

Fit guidance for RER43606 and 70127

Fit guidance starts with your model's manual, not with a forum post. Redcat uses different part numbers across platforms, and two numbers can look similar while mounting differently. Confirm the number, the position, and the quantity required before checkout.

If your manual lists RER43606, buy RER43606. If it lists 70127, buy 70127. If it lists neither, you are likely looking at a different revision or a different model, and you should verify with Redcat support or a parts diagram before ordering.

• Confirm quantity: some parts ship as a single piece, others as a set.
• Check whether the part is left or right specific before installing.
• Test fit without fully tightening screws so you can adjust alignment.

Trade-offs to weigh before you order

• Correct fit vs lower price: A discounted part that does not match your model costs more in return shipping and downtime than the correct part. Match the part number first, then compare price.
• Single part vs set: Some numbers ship as one piece, others as a set. Buying a set like RER13666 or 07406 can cover your next repair, but only if the parts fit your model. Check the quantity in the listing before checkout.
• Function match vs number match: RER43606 and 70127 may serve different functions. If the functions differ, they are not alternatives, no matter how similar the listings look. Confirm the function on your vehicle before comparing numbers.

Catalog facts that help you decide

• RER25594: Rear Motor (1pc) A rear motor is a drivetrain replacement, so it is not an alternative to a chassis or mount part. Use it when your diagnosis points to motor failure, not when you need a mounting solution.
• RER26715: Center Drive Shaft Set (1Set) This is a multi-piece assembly, so it replaces the whole center drive section rather than one worn joint. Buy it when the shaft or its components are damaged together.
• RER13666: 2.3x6mm Countersunk Phillips Self Tapping Screws (12pcs) A 12-piece hardware set keeps your repair moving and gives you spares. It is the right add-on when you are already replacing a mounted component.
• RER17999: Battery Tray (2pcs) A two-piece battery tray is a fitment-specific part. Confirm your battery size and mounting pattern before ordering, because a tray that does not match will not hold the pack securely.

Which one should you choose?

Choose RER43606 if

• Your manual or old part lists RER43606 and you need a direct replacement
• You have confirmed the function and mounting position on your specific Redcat model

Choose 70127 instead if

• Your manual or old part lists 70127 for the repair you are doing
• You need a different function or fitment than RER43606 provides

The right choice between RER43606 and 70127 comes down to your model's manual and the number on the failed part, not to which listing looks better. Confirm the function, check the quantity, and order the number that matches your vehicle. If you are unsure, verify with Redcat support before you buy.